Cook hamburger and onion together until hamburger is browned all the way through. Drain grease. Then add to crockpot.
Add all remaining ingredients together in crockpot.
Cook on High for 3 hours or low for about 6 hours.
Pour into bowls. We like to add cheese and corn chips on top.
Notes
Add andouille sausage for even more protein.
To make it spicy, here is what we recommend adding the following ingredients: chopped jalapeño (you could also use canned), cumin or cayenne pepper, or red pepper flakes.
Thicken up the sauce by adding some tomato paste as needed.
Favorite toppings to use with chili: Greek yogurt (or sour cream), shredded cheddar cheese, and diced green onions.
Add more flavor by adding diced green pepper or red pepper.
Switch out the diced tomatoes for fire-roasted tomatoes for a little more kick.