Preheat your oven to 400°F (200°C).
In a microwave-safe bowl, combine 1 1/2 cups of shredded mozzarella cheese and 2 tablespoons of cream cheese. Microwave on high for about 1 minute, or until melted. Stir well.
Add 2/3 cup almond flour, 1 beaten egg, and 1 teaspoon baking powder to the melted cheese mixture. Stir until a dough forms.
Place the dough between two sheets of parchment paper. Roll out into a circle, about 1/4-inch thick.
Transfer the dough to a baking sheet and remove the top sheet of parchment paper.
Bake the crust in the preheated oven for 10 minutes, or until golden brown.
Remove the crust from the oven and spread 1/4 cup of low-carb tomato sauce over it.
Top with 1/2 cup shredded mozzarella cheese and pepperoni slices to taste.
Return the pizza to the oven and bake for another 10 minutes, or until the cheese is bubbly and golden.