Instructions

• Preheat the oven to 400 degrees F (200 degrees C). Grease 8 muffin cups or line with paper liners.
• Set aside 1/2 Cup sugar, 1/3 Cup flour for Crumb Topping. Mix the rest of the dry ingredients.
• Pour oil into a small liquid measuring cup. Add egg and enough milk to reach the 1-cup mark; stir until combined.
• Pour into flour mixture and mix just until batter is combined. Fold in blueberries; set batter aside.
• To make the crumb topping: Combine remaining sugar, flour, butter, and cinnamon in a small bowl. Mix with a fork until crumbly.
• Spoon batter into the prepared muffin cups, filling right to the top. Sprinkle with crumb topping.
• Bake in the preheated oven until a toothpick inserted in the center of a muffin comes out clean, 20 to 25 minutes.