Place a large pot on medium heat. Add oil and let it warm up. This helps cook the ingredients evenly and prevents sticking.

Add chopped onion and garlic to the pot. Cook for a few minutes until soft. Stir gently so they do not burn. This builds a strong flavor base.

Add ground beef to the pot. Cook until it turns brown. Break it into small pieces using a spoon. This helps create a smooth chili texture.

Add tomato sauce and tomato paste. Stir well to combine. This gives the chili its rich and deep color.

Add beef broth slowly while stirring. This helps create a thick but smooth consistency. Mix everything well.

Add chili powder, cumin, cinnamon, paprika, salt and pepper. Stir well so spices spread evenly. This gives the chili its signature taste.

Lower the heat and let the chili simmer for about 30 minutes. Stir occasionally. This helps flavors blend and thicken nicely.

If using beans, add them now. Stir gently and cook for another 10 minutes. This adds texture and extra nutrition.

Cook spaghetti according to package instructions. Drain and keep ready. This is the base for serving the chili.

Place cooked spaghetti in a bowl. Pour hot chili over it. Add grated cheese on top if you like.

Serve hot and enjoy your homemade Real Chili Milwaukee recipe. It is rich, warm and very satisfying.