Making the Coffee Cake

• Preheat your oven to 350°F (175°C). Grease and flour a 9x13 inch baking pan.
• In a large bowl, whisk together the flour, sugar, baking powder, and salt for the cake batter.
  2.5 cups all-purpose flour
• Add the softened butter to the dry ingredients and mix with a pastry blender or your fingers until the mixture resembles coarse crumbs.
  2.5 cups all-purpose flour
• In a separate small bowl, whisk together the eggs and vanilla extract.
  2.5 cups all-purpose flour
• Gradually add the egg mixture and milk to the dry ingredients, mixing until just combined. Be careful not to overmix.
  2.5 cups all-purpose flour
• Gently fold in the blueberries.
  2.5 cups all-purpose flour
• Prepare the streusel topping: In a medium bowl, combine flour, brown sugar, and cinnamon. Cut in the cold butter until the mixture is crumbly.
  2.5 cups all-purpose flour
• Spread the cake batter evenly into the prepared baking pan.
• Sprinkle the streusel topping evenly over the cake batter.
• Bake for 40-45 minutes, or until a wooden skewer inserted into the center comes out clean.
• Let the coffee cake cool in the pan for 10-15 minutes before slicing and serving.