Preheat oven to 356 degrees Fahrenheit (180 degrees Celsius). Line a 6 cup jumbo muffin pan.
- ⅛ cup buttermilk
- ⅓ egg
- ⅔ tbsp vegetable oil
- ⅔ tbsp butter
- ⅓ tsp vanilla extract
In a small bowl, combine the wet ingredients.
- ⅜ cups flour
- ½ tsp baking powder
- ⅛ tsp baking soda
- ⅛ cup sugar
- ⅓ pinch salt
In a large bowl, combine the dry ingredients.
- ⅓ lb blueberry
Add the wet ingredients to the dry ingredients. Fold in blueberries.
Add equal amounts of batter to the 6 cup jumbo muffin pan.
- ⅓ tbsp flour
- ⅔ tbsp sugar
- ⅛ tsp ground cinnamon
- ⅓ tbsp butter (cold)
In a small bowl, combine flour, sugar, cinnamon, and butter to make a streusel topping. Mash together with a fork or your hands.
Add the streusel to the top of the muffins.
Bake muffins at 356 degrees Fahrenheit (180 degrees Celsius) for 25-30 minutes or until golden brown edges. Let rest for 15 minutes before eating.