Homemade Mouse Poison Baking Soda: How To Make It In 3 Steps

poisoned rat

How can you make mouse poison at home? When thinking about making homemade mouse poison, baking soda is typically not what comes to mind first. This is because we all know that baking soda can be safely used for cooking. Ergo, it is also safe for our consumption, and probably for the mice as well.

Products Needed

Unknown by many, baking soda is actually quite versatile. It can be used at home in many different ways such as for cleaning and disinfecting bathroom tiles, and the kitchen sink. It can be used to get rid of stubborn stains and odors on carpets, and it can also be used to make a homemade rodenticide.

Discovering how to make mouse poison out of baking soda can be quite useful especially when you see newborn vermin running around your house unexpectedly. By creating this homemade poison, you will no longer have to wait for another day to buy some, as you can tackle the infestation right away.

Preventing Mice from Entering Your Home

Entry Points

The first line of defense against rodents is to seal up any spots where the critters can get into your house. This might be somewhat challenging because mice can squeeze through tiny openings as small as a quarter of an inch. This basically means that any hole that a pencil can fit in is sufficient as an entry point for a rodent. Seal up cracks and openings in walls and also cracks in the foundation where pipes and vents are located. It’s important to use the right kind of sealant materials because mice can easily gnaw through wood, plastic and rubber. The best materials to use are steel wool and caulk. 

Garbage Cans

It’s usually best to have metal garbage cans with metal lids because they are heavy and the lid fits on tightly. If you have plastic garbage cans, make sure there are no cracks or small holes for the mice to get in. You could also use mouse-repellent garbage bags that have a minty smell that mice hate. 

Debris and Clutter

Rodents like to hide in piles of clutter and other untidy areas. Don’t let weeds grow out of control, and look for spots where they can burrow. You could consider lining the foundation with heavy gravel to eliminate burrowing spots. Keep the outside areas around your exterior walls free of cardboard, wood or any other items that could serve as shelter for mice. 

Food Sources

If you have a compost, especially if there are garden vegetable scraps involved, it could attract rodents. You want to keep the compost raised up at least a foot off of the ground to prevent them from reaching it. If you have trees that grow fruits or nuts, pay attention to any fruit or nuts on the ground and keep your lawn free of these food items. Inside the house, you don’t want to ever have food items that are left out as a temptation for pests. Get some airtight storage containers and jars to store dry foods and leftovers. After cooking and eating meals, make sure to thoroughly clean up any spills, and rinse food off of dishes before placing them in the sink. Consider using rodent-repellent trash bags in the interior garbage cans and waste paper baskets. 

In the Garage

If you have landscaping products in your garage or tool shed, they could attract rodents. Items such as tulip bulbs, lawn seed and bone meal are sources of food for rats and mice. To keep rodents away, store these items in metal or glass containers. Try to avoid stacking boxes or wood on the ground in your garage because these are potential nesting areas for mice. 


If you happen to be a cat lover, it can definitely work in your favor where rodents are concerned. This is an old-school way to control mouse populations that actually works. Farmers have used cats to get rid of rodents for generations. Most cats enjoy hunting mice, but if you prefer dogs, some breeds enjoy hunting and might help discourage rodents from taking up residence in your house.

Homemade vs Store Bought Mouse Poison

When dealing with mice and rodent problem in your home, both store bought and homemade poisons can be effective when dealing with the problem. There are a few differences when comparing store bought mouse poison and homemade versions.

The first main difference is that homemade poisons are obviously used with products already in your home. Often times homemade poisons can be made, including this baking soda recipe, without needing to run to a store to buy anything. This is a cost effective strategy to deal with a mouse problem. If additional products are needed to make homemade poisons, often times they will be cheaper than buying a mouse poison at the store.

Another difference is that homemade poisons are easy to make and they can be made on an as needed basis. Store bought poisons can take up unnecessary space in one’s home, and they also have short shelf life once opened. Often times the store bought poisons will not be used completely.

Items Needed To Prepare In Making The Poison

making chemist stuff

Baking soda can be turned into a poison that is deadly for mice simply because it creates a lot of gas when ingested by them. You need to keep in mind that rodents do not have the ability belch or expel the gas inside the stomachs. If the increase in gas level rises fast enough, the mouse will die from it.

Since the baking soda needs to be ingested in order for it to work its magic inside the mouse, you need to make use of other food items that you can use as ingredients to help make the baking soda more palatable. Keep in mind that mice have bait shyness and they are very cautious when it comes to food.

Get to know other ways to get rid of rats, go to How To Keep Rats Away.

Here are some of the things that you will need to make the poison:

1. Baking Soda

baking soda

Baking soda needs to be freshly opened out of its packet for best results. You do not want to use old or expired baking soda, or ones that have been opened for too long as it might not give you the desired effect. There are a lot of possible substitutes to baking soda but none can be used in making the poison.

Arm & Hammer Baking Soda - 64 oz
  • Arm & Hammer baking soda is pure, safe and natural
  • For scratchless cleaning in the kitchen and bathroom
  • Absorbs and eliminates odors on contact

If you do not have baking soda, you might want to try using plaster of Paris instead. Although it might work, you should know that some experts do not recommend this because it is not edible in the first place, and it can easily harden and make your poison useless over time.

2. Flour


When handling the flour, you might want to use gloves so you can avoid tainting it with your scent. It is best if you use fresh flour, or one that has a nice, sweet aroma. Keep in mind that you need to entice the mouse with it, you might want to make sure that you use a flour with decent quality.

White Lily Unbleached Bread Flour, 5 Pound
  • Great for bread, rolls, pizza crusts and other baked goods
  • High protein/high gluten flour for high rising breads
  • Unbleached - no chemical bleaching used.

If flour is not available to you, you can opt for corn meal, but not corn starch. Corn meal has a distinct odor and flavor which might be appealing to the mice. You can also try using oatmeal, or flour made from nuts as they mice really like to eat nuts and grains. You can also use instant or boiled potatoes.

3. Sugar


Sugar is used to help attract the mice. They are very keen on smelling and eating sweets and this can help attract them towards your poison and it can also make them want to eat more of it. You can actually replace sugar with other sweeteners like honey, or better yet, chocolate or peanut butter.

4. Water


Water does not have to be used in order to make a poison. But it can be used to bind everything together. You can also replace water with milk to make it more appealing to the mouse. If you wish, you can even make use of almond milk, cream, and other similar items but not yogurt or anything sour.

If you want to kill rats by setting traps, take our advices at What To Put On A Mousetrap or get the best products at Best Mousetrap Of 2017.

Making Mouse Poison Baking Soda

baking soda cleaning

Step 1: Preparing All The Ingredients

The ingredients need to be properly measured depending on your needs. You should use a 1:1:1 ratio for the dry ingredients, and the amount of water needed will depend on the consistency of the poison that you want to use.

Use gloves before you handle all the ingredients and make sure that they are all properly measured before you move on to the next step.

Step 2: Mixing The Ingredients

In order to make the poison, you will need to mix all the dry ingredients together. Keep in mind that the dry ingredients alone are enough to make the poison and that you can leave this mixture for the mice to eat even without adding water.

When adding water or milk, you should avoid making the poison too wet, or runny. Use enough to make a dough ball out of all the dry ingredients. Make the size of the ball small enough to fit inside areas where the mice may be hiding or nesting.

Step 3: Placing The Poison In Strategic Locations

If you want the poison to work, make sure that you place the mixture of dry ingredients, or the dough balls on areas that get a lot of traffic from the mice. You should put it near their nest, or inside holes where they hide in. It is best that you put them inside dark areas where they can freely eat it.

You might want to know What Smell Do Rats Hate to deal with them by another way, click the link to find out.


dying rat

When making the homemade baking soda mouse poison, keep in mind that it will not kill the mice right away. It will take time for the baking soda to react inside their stomachs, and it might take days before you see dead ones inside your house.

Another thing you need to remember is that baking soda does not cause neurological damage like the conventional rodenticides. If a mouse dies from your homemade poison, the mouse might die inside the next or hiding spot, not outside. This can cause unwanted odors to develop inside the house.

Last update on 2021-01-20 at 18:22 / Affiliate links / Images from Amazon Product Advertising API

About the Author Emily Taylor

My name is Emily Taylor, gardening is my passion and I’m looking forward to sharing it with everyone. I know that there are millions of people out there want their backyard and garden be attractive just like their front yard, so I am here to help you create your own backyard paradise.

Leave a Comment:

Erma Gurr says Sep. 2017

Won’t the mice poisoning combo’s attract other critters like roaches? Is there a poison that will kill both? Thank you.

Kim Sparks says Nov. 2017

How long will the concotion start working.

Emmanuel Marbella says Jan. 2018

How long does it take for the rat to be neutralized prior to the time of the intake? I’m asking for the cause of my group’s research about rat neutralizing. Thanks!

Melissa A Czizek says Jan. 2018

Need help with home remedies to kill mice. Thank you.

Jean balcerzak says Feb. 2018

How can I kill a nonstop vine?

July says Feb. 2018

Can it kill a human if eaten, if not then what can it do to your human body

Stephen Weber says Mar. 2018

HELP!! I have mice that I have not been able to get rid of. I even called an exterminator, who came and placed traps around–which, although they caught quite a few, did not catch all of them. A friend of mine suggested I use baking POWDER, but now I am not sure, because of what you stated in your artixle. Could you please get back to me with regard to:

1. Whether baking powder is a valuable alternative to baking soda for me to use.

2. Whether I can use a sweetened peanut butter (like the Jif they sell at the dollar store) as a food source–to mix with the baking soda (or baking powder).

Please get back to me. I can’t stand the situation any more.

Thank you,
God bless!

Julie says May. 2018

I have a question about. I never use regular mouse or rat poison because it also kills birds and wildlife that might eat the dying mouse. Also, I have a cat. Is this homemade mouse poison safe for my cat, birds and other wildlife? Thank you very much!

Eileen M Waits says Jun. 2018

How large should the balls be made plz

Daniel Pressley says Dec. 2018

Dear Emily.

Thank you a look much for this terrific baking soda idea.

But can I just check please? Is it definitely okay to add water to the mixture? ….. I am concerned that the water could disrupt the action of the baking soda?

Best wishes, Daniel

Carol says May. 2019

When there are so many cruelty free products on the market (which work) for catching mice, why do you use poison???!

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