Preheat the oven to 350°F and line a baking sheet with parchment paper.
Blend the cottage cheese, egg, sugar, melted butter, orange juice, and orange zest until smooth.
Whisk the vanilla protein powder, all-purpose flour, oat flour, baking powder, cardamom, and salt in a bowl.
Stir the cottage cheese mixture into the dry ingredients until just combined.
Chill the dough for 25 minutes to make it easier to scoop.
Scoop 12 portions onto the baking sheet and flatten each cookie slightly.
Bake for 11 to 13 minutes, until the edges are lightly golden and the centers look set. Cool the cookies on the sheet for 10 minutes.