Pre-heat oven to 350 degrees

Add all of the dry ingredients to a mixing bowl

Add the butter tabs to the dry ingredients

Using your hands, rub the butter into the flour so that it becomes small pea-sized pieces

Add the eggs and buttermilk, and stir to combine

Add the blueberries and gently stir to combine

Scoop batter into muffin papers that have been gently sprayed with non-stick spray

Bake in oven for about 35-45 minutes, spinning tray once to ensure even baking