Preheat oven to 350 ° F. Prepare a 8×8” pan with parchment paper. Set aside.
Prepare the baked oat layer: In a medium bowl, combine eggs, milk, coconut oil, maple syrup and vanilla extract and mix well. Add oats, spices, baking powder and salt and stir until fully combined. Pour into an even layer along the bottom of your baking pan.
Pour your blueberries in an even layer on top of your baked oat layer.
Prepare your crumble topping: In a medium bowl add oats, oat flour, walnuts, cinnamon, coconut oil and maple syrup. Using a fork, mix everything together until a crumble forms. See notes above for troubleshooting your texture! Sprinkle the crumble topping over the blueberries. Bake for about 45 minutes or until top of oat crumble begins to brown and blueberries begin bubbling.
Remove from the oven, let cool completely, and cut into squares.
