Spray a 9x13” pan with non-stick cooking spray and set aside. In a bowl, mix together flour, sugar, baking powder, lemon juice, nutmeg, cinnamon, and salt.
Add in the milk, butter, egg, and vanilla. Beat until it’s all mixed together and pour into the prepared pan.
Sprinkle blueberries on top.
For crumble topping; In a mixing bowl, combine sugar and flour, then add butter. Use a fork to roughly mix together until crumbly and then sprinkle crumble topping over the blueberries.
Bake for 40-45 minutes or until the top and edges are lightly browned.
Notes
You can use frozen blueberries, just don’t thaw them before or they will turn your batter purple!