Starving-Student Baked Beans

2 tablespoons of brown sugar
1 tablespoon of yellow mustard
1 cup of ketchup
1 (15 ounce) cans of northern beans, white beans, or pinto beans

Preheat the oven to 350 degrees F.

Combine all the ingredients in a casserole, baking dish, or cast iron skillet.

Bake for 45 minutes.