In a large skillet, heat the olive oil over medium heat. Add the chopped onion and minced garlic, sautéing until the onion is translucent.
Add the ground chicken to the skillet, breaking it apart with a spatula. Cook until browned and fully cooked, about 5-7 minutes.
Stir in the cumin, chili powder, salt, and pepper. Mix well to distribute the spices evenly. Remove from heat.
While the chicken mixture cools slightly, wrap the corn tortillas in a damp paper towel and microwave for about 30 seconds to soften.
Lightly grease a muffin tin. Take one tortilla and place it in a muffin cup, gently pressing it down to create a taco shell. Repeat with remaining tortillas.
Spoon the chicken mixture into each tortilla cup, filling them generously. Top each with shredded cheddar cheese.
Bake in the preheated oven for about 15-20 minutes, or until the tortillas are crispy and the cheese is melted and bubbly.
Remove from the oven and let cool for a few minutes. Carefully lift the taco cups out of the muffin tin.
Serve warm topped with fresh shredded lettuce, diced tomatoes, a dollop of sour cream, and chopped cilantro.
Notes
Serve warm and customize with your favorite toppings.