Writing this had me in a bind since I found this in one of the old how-to notecards we have lying around at home. After a bit of Googling, I found similar formulations but from different authors have not cited where this came from (either this is an old household remedy or the real source hasn’t been cited).

More MacGyver household remedies again with this homemade roach bait formula.

Ingredients

1/4 cup lard or shortening
1/8 sugar
8 ounces powdered boric acid
1/2 cup flour
1/2 chopped onion
Water to form a soft dough

Preparation

1. Mix the lard and sugar until you get a creamy mix.
2. Mix the boric acid, flour, and onion.
3. Add to the lard and sugar mix.
4. Add enough water to form a soft dough.
5. Shape the mixture into soft balls or drop a small amount on opened small plastic bags.

Now you can place these where Mr. Cockroach and his gang usually lurk (cupboards, under the sinks, under the fridge and dishwasher…) Just keep them away from pets and small children. Boric acid is poison! It’s the real active ingredient in this mix.

Sources(?): Heloise, Mike Holigan