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. Mix until a soft dough forms, adding more almond milk if needed to bring dough together.
04 - Place dough between two sheets of parchment paper and roll out to 1/4 inch thickness.
05 - Cut dough into 12 rectangles measuring approximately 3x4 inches each.
06 - Place 6 rectangles on prepared baking sheet. Spoon 1 tablespoon of jam onto the center of each, optionally mixing protein powder into jam first.
07 - Top with remaining rectangles and 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 powdered erythritol, almond milk, and vanilla extract until smooth and drizzleable.
10 - Drizzle icing over cooled pop tarts and let set for 5 minutes before serving.