|Preheat the oven to 400˚F Degrees (200˚C)|
Grease the muffin cups or line with muffin liners.
Combine 1 1/2 cups flour, 3/4 cup sugar, salt and baking powder. Place vegetable oil into a 1 cup measuring cup; add the egg and enough milk to fill the cup. Mix this with flour mixture. Fold in blueberries. Fill muffin cups right to the top, and sprinkle with crumb topping mixture.
|Crumb Topping:Mix together the sugar, flour, butter, lemon zest, and cinnamon. Mix with fork, and sprinkle over muffins before baking.|
|Bake for 20 to 25 minutes in the preheated oven, or until done. Enjoy these aweome buttery muffins!|