Homemade Rat Poison That Really Works to Kill Rodents

Did you know that pests, like rats, usually cause most fires from electrical wirings and spoiled insulators? Now you know. Rats not only bring bubonic plague and amoebiasis to humans, but they also distort our home structures and destroy food too. That’s why many people never hesitate to get rid of these troublesome creatures.

If you have seen cats poop, urine, or their activity in your home, it would be best if you got rid of them quickly. Rats can multiply rapidly and become a problem if not handled in good time. However, not all people want to use lethal commercial rat poison like anticoagulants or bromethalin. If you’re one of those people, you can create a homemade rat poison.

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How to Make Effective Homemade Rat Poison in 2023?

Even though rat traps are useful, they are not ideal for killing many rats at once, like rodenticide. If you want to be more humane and use homemade mouse poison instead of commercial rodent poison, you’re in the right place. We’re going to notify you of how you can create different mouse poisons with items at home. Homemade rat poison may not be as toxic as commercial mouse poison, but it’s still dangerous and should be kept far from your pets and kids. The moment you mix the ingredients that we’re going to show you, it becomes poison.

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How to make Mouse poison at home?

Making rat poison at home is super easy if you’ve got one of these items – boric acid, plaster of Paris, and baking soda. All of these substances can be mixed with a few ingredients to make rodent poison. Some of the ingredients include flour/cornmeal, chicken broth, and sugar or powdered chocolate mix. Other items that you will need are disposable gloves and jar lids. Here’s how you will mix different things:

Use Baking Soda

You may be asking yourself – why baking soda? The bicarbonate in the baking soda reacts with the rodent’s stomach acids to create a carbon dioxide gas. Because rats cannot pass the gas instead, it builds up the rodent’s system and slowly leads to internal blockage or rupture.

Step 1: Add flour to sugar and baking soda. Next, mix equal parts of flour and sugar in a bowl. These will be the ingredients that attract rats to the poison. Add another equal amount of baking soda to the mixture and stir it together.

If you don’t have flour, you can mix sugar and cornmeal. Alternatively, you can also replace sugar with a hot chocolate mix and add baking soda. After choosing the ideal mixture, mix it and put it in a blender to get a more homogenous mixture. Another option is mixing 1 part baking soda with 2 parts peanut butter. Rats love peanut butter, and it will act as the bait.

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Step 2: After selecting the preferred baking soda mixture, you should put it into small bowls. If possible, use disposable bowls or lids. You don’t want to reuse these containers after getting in contact with the poisonous mixture you’ve created.

Step 3: Place the bowls where there is rat activity. If it’s below the cupboard, put it there. Also, look for the rat dwelling place and put it on its path. The rat will ingest the poison and die slowly.

How to make plaster of Paris mouse poison?

If you’ve got plaster of Paris in the house, you can also create rat poison by mixing it with milk and cornmeal.

Step 1: Take a quarter of plaster of Paris and mix it with a quarter of cornmeal in a large bowl. Mix equal parts of these ingredients by weight in the bowl. It is easy to get plaster of Paris as it can be found in home improvement stores. On the other hand, you can buy cornmeal from a grocery next to you.

In case you don’t have cornmeal, you can use flour instead. Plaster of Paris effectively kills rats as it hardens the rat’s stomach, hence destroying it.

Step 2: Add a quarter cup of sugar to make the mixture more enticing. However, adding sugar to the plaster of Paris and cornmeal is optional. Sugar brings some sweetness that the rats will be attracted to.

Step 3: Next, add some milk to the powder mixture. Begin with one cup of milk as you add more. Avoid adding excess milk as the mixture should not be very wet. If you don’t have milk, you should add water. Adding milk is preferred because it adds flavor to the rat poison. Regardless, the rats will be attracted to the cornmeal or flour mixture.

Step 4: After adding milk to the mixture, you should knead the mix together with your hands. This mixture is not harmful to humans; therefore, it’s not an issue to use your bare hands. Nevertheless, you can wear gloves to avoid making your hands sticky.

If the mixture isn’t sticking together, add some milk or water, depending on what you’re using. This is because you need to form a dough you can roll into balls to make baits. On the contrary, if it feels wet, add more plaster of Paris and cornmeal or flour.

Step 5: Finally, roll the mixture into balls about the size of golf balls. You can even make smaller balls or the size that you like. Regardless of the size, the rodents will feed on the delicious poison. Place the balls away from kids but close to where there’s rats activity.

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How to use boric acid as homemade rat poison?

Another mouse poison that you can make at home is boric acid. Boric acid has been proven to kill insects, but it’s also useful in killing rats and other rodents. The chicken broth’s odor will entice the rats, which will urge them to feed on this paste and suffocate to death.

Step 1: Start by wearing disposable gloves to prevent skin irritation. Next, put on a cup of boric acid in a bowl. Add chicken broth to the boric acid. Ensure to put around ½ teaspoon at a time. Stir appropriately after every addition until you create a thick paste that’s no longer easily stirred. If you feel that the mixture is extremely thin, add some boric acid.

Step 2: Roll the paste into small balls. If possible, get disposable tins or containers and put the balls. Disposable containers are suitable because you won’t reuse them after placing poisonous baits on them.

Step 3: Put the rat baits in areas where you have seen rat activity. Look for rat droppings or their nesting. Also, you can put it on their path, but they should be out of reach of kids and pets.

Step 4: Monitor the baited areas and get rid of the dead rats in time. You don’t want your pet to consume the dead rat.

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What’s the best way to keep rats away from your yard?

Instead of struggling to get rid of rats in your home, there are several things that you can perform to deter them from entering your home. These are as follows:

  • Keep away bags of trash inside sealed garbage cans
  • Check for holes and crevices where rats and other pests can enter. Make repairs and seal those loopholes.
  • Ensure the lids on your garbage cans are properly sealed
  • Regularly inspect dark and unused areas in your home.
  • Properly seal your compost pile or worm bin. Besides, don’t put dairy products or meat in the compost.
  • Avoid planting bushes or trees close to your home
  • Keep food for pets and birds and sealed containers. Also, avoid leaving birdseed on the ground or in seed feathers.
  • Tidy up and dispose of dog droppings properly
  • Clean your home regularly


If you don’t want to kill rats lethally but have a massive rat infestation, creating a homemade rodenticide is a good option. There are various things that you can use to make mouse poison in the comfort of your home. These include Plaster of Paris, baking soda, and boric acid. All of these items are effective but not as lethal as commercial rat poison. However, it would be best to treat homemade rat poison with seriousness as it’s also poisonous. Could you keep it away from your kids and pets? Additionally, it would help if you disposed of it correctly after using it.

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