Preheat your oven to 350°F (175°C) and prepare a muffin tin with silicone liners or cooking spray.

In a large mixing bowl, combine almond flour, mozzarella, Parmesan, baking powder, garlic powder, Italian seasoning, salt, and pepper.

In a separate bowl, whisk the eggs until light and fluffy. Gradually add to the dry ingredients until a thick batter forms.

Fold in the pepperoni slices and marinara sauce, ensuring even distribution.

Spoon the batter into prepared muffin cups, filling each about 3/4 full. Top with additional cheese if desired.

Bake for 20-25 minutes. Check for doneness with a toothpick; it should come out clean.

Remove from oven and cool for 5 minutes before transferring to a wire rack to cool completely.