01 -
Cook the ground beef in a skillet until browned. Drain any excess fat.
02 -
Add the ground beef, marinara sauce, garlic powder, Italian seasoning, salt, and pepper to the crockpot.
03 -
Stir in half of the mozzarella cheese and Parmesan cheese.
04 -
Top with the remaining cheese and pepperoni slices.
05 -
Cook on low for 4 hours until the cheese is melted and bubbly.