Preheat and Prepare: Start by preheating your oven to 400 degrees (200°C). Line a cookie sheet with parchment paper, or an silicone mat.
Form Cheese Circles: Put about ¼ cup shredded cheese into a circle, roughly 5 inches wide. Keep adding circles of cheese, spaced apart.
Bake Until Golden: Put the tray into the oven and bake for 7-10 minutes, until the cheese is bubbling and slighly browned on edges.
Shape into Shells: Use a spatula to carefully lift each cheese circle and drape over a wooden spoon handle balanced between two cups or cooling rack to create taco shell shape. Allow to cool and set for 5 minutes.
Serve and Fill: It is the best way to enjoy all of your favorite taco toppings (like ground beef, avocado, lettuce, sour cream) while keeping it keto!