Brown the hamburger in a large pot or Dutch oven.

Drain any excess fat from the browned hamburger.

Chop the onion into small pieces.

Add the chopped onion to the pot with the hamburger.

Cook the hamburger and onion mixture over medium heat until the onion is softened and translucent.

Pour in the tomato sauce and tomato paste into the pot.

Mix the ingredients together well.

Add the chili powder, garlic powder, cumin, salt, and pepper to the mixture.

Stir the spices into the chili thoroughly.

Cover the pot tightly.

Reduce the heat to low and simmer the chili for several hours (at least 2 hours).

Stir the chili occasionally during the simmering process to prevent sticking and ensure even cooking.

If desired, add two cans of kidney beans during the last hour of simmering.

Stir the kidney beans into the chili and continue to simmer until heated through.