Heat oven to 350 F and line an eight inch pan with parchment.
Whisk almond flour coconut flour baking powder sweetener and salt in a bowl.
Microwave mozzarella and cream cheese in a safe bowl in short bursts until melted then stir smooth.
Fold the flour mix into the warm cheese mix then add egg and vanilla and knead until a soft dough forms.
Place the dough between two sheets of parchment and press into a rectangle about quarter inch thick.