Following these simple steps will ensure your Bursting Blueberry Crumb Cake is a hit:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan.
2. Prepare Blueberries: Rinse the blueberries and set them aside to dry on a paper towel.
3. Mix Dry Ingredients: In a bowl, whisk together 1 ½ cups of flour, baking powder, baking soda, and salt.
4. Cream Butter and Sugar: In a large mixing bowl, cream the softened butter and granulated sugar until light and fluffy.
5. Add Eggs and Vanilla: Beat in the eggs, one at a time, followed by the vanilla extract.
6. Combine Mixtures: Gradually add the dry ingredients to the butter mixture, mixing just until combined. Gently fold in the blueberries.
7. Prepare Crumb Topping: In a separate bowl, combine ¾ cup of flour, brown sugar, and cinnamon. Pour in melted butter and mix until crumbly.
8. Assemble and Bake: Pour the batter into the prepared pan and spread evenly. Sprinkle the crumb topping over the batter.
9. Bake: Place the cake in the preheated oven and bake for 40-45 minutes, or until a toothpick inserted in the center comes out clean.
10. Cool and Serve: Remove from the oven and let cool in the pan for 15 minutes. Dust with powdered sugar before serving if desired.