To a blender add 160g (⅔ of the oats) and blend into a flour (takes 30 seconds).
Add this oat flour to a separate large mixing bowl along with the leftover 80g of whole oats, butter, maple syrup and mix together with your hands.
Top it on your crumble of choice and bake. I recommended baking at 180C/360F for around 25 minutes for the optimal oat crumble topping.
Video
Notes
Step-by-Step Photos: My blog post includes helpful step-by-step photos to help guide you through making this recipe.Substitutions & Variations: I have included a list of these in the post above.To Store: Store in an airtight container in the fridge for 1-2 days once cooked. To Freeze: This crumble will freeze for about 3 months in an airtight container.Tip 1: If you are going to use this easy crumble topping on something that isn’t going to be baked, make sure you bake it on its own first.Tip 2: Don’t overmix this topping. Make sure it stays crumbly rather than becoming like dough.Tip 3: If you want to level up a box mix, this crumble topping is your answer! Just sprinkle it on top of whatever muffins, cakes, or sweet breads you are making and be ready to impress your friends and family!