Preheat oven to 350°F.
Whisk together oat flour, pea protein, arrowroot, baking powder, and salt.
Add coconut oil, maple syrup, applesauce, and vanilla.
Chill 10–15 minutes — pea protein thickens slightly as it absorbs liquid
Fold in blueberries or white chocolate if using.
Scoop 2 tbsp dough balls, flatten slightly.
Mix crumble ingredient with a fork until it forms moist crumbs.
Sprinkle generously over each cookie before baking.
Lightly press the crumbs so they stick.
Bake 9–11 minutes
Cool 10 minutes
•Whisk you glaze ingredients together until drippy, and drizzle over cookies