Bake or Fry the corn tortillas, if not using store bought tostada shells. See recipe card notes.

Add ground beef to a skillet over medium heat. Cook, breaking into small pieces with a wooden spoon, until browned. Remove grease.

Add onion and seasonings and cook an additional few minutes.

Add the refried beans to a microwave safe bowl, or a small skillet over medium heat. Stir in a small scoop of sour cream, or Mexican crema. Cook until warmed through.

Assemble the tostadas: Spread a thin layer of refried beans over the tostada shell. Top with a small spoonful of ground beef, then lettuce, cheese, avocado, salsa, sour cream and hot sauce.

Serve immediately.