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 until well blended.
03 - Add Greek yogurt, almond milk, melted coconut oil, and egg to the dry mixture. Stir until a soft dough forms, adding additional almond milk only if needed to bring dough together.
04 - Place dough between two sheets of parchment paper and roll out to approximately 1/4 inch thickness.
05 - Cut dough into 12 rectangles measuring approximately 3x4 inches each.
06 - Place 6 rectangles on the prepared baking sheet. Spoon 1 tablespoon of jam onto the center of each, optionally mixing protein powder into the jam first.
07 - Top each filled rectangle with remaining dough pieces. Press edges firmly with a fork to seal completely.
08 - Bake for 13–15 minutes until slightly golden. Allow to cool completely on the baking sheet.
09 - Whisk together powdered erythritol, almond milk, and vanilla extract until smooth and drizzle-consistency.
10 - Drizzle icing over cooled pop tarts and let set for 5 minutes before serving.