01 - Preheat oven to 350°F and line a baking sheet with parchment paper.
02 - In a large bowl, combine oat flour, protein powder, almond flour, coconut sugar, and salt.
03 - Add Greek yogurt, almond milk, melted coconut oil, and egg. Stir until a soft dough forms, adding more almond milk if needed.
04 - Place dough between two sheets of parchment paper and roll to 1/4 inch thickness.
05 - Cut dough into 12 rectangles approximately 3x4 inches each.
06 - Place 6 rectangles on prepared baking sheet. Spoon 1 tablespoon jam onto center of each, mixing in protein powder if desired.
07 - Top with remaining rectangles and press edges with a fork to seal completely.
08 - Bake for 13-15 minutes until slightly golden. Cool completely.
09 - Whisk powdered erythritol, almond milk, and vanilla extract until smooth.
10 - Drizzle icing over cooled pop tarts. Let set for 5 minutes before serving.