INSTRUCTIONS:

1st Step

Prepare your oven to 425°F (220°C) and line a baking sheet with parchment paper.

2nd Step

Mix Dry Ingredients: In a large mixing bowl, combine the all-purpose flour, granulated sugar, baking powder, baking soda, and salt. Mix them together until well combined.

3rd Step

Incorporate the Butter: Add the cold, cubed butter to the dry ingredients, then work the butter into the flour mixture until it resembles coarse crumbs.

4th Step

Add Blueberries and Wet Ingredients: Gently fold in the fresh blueberries, buttermilk, vanilla extract, and lemon zest (if using). Mix until just combined; be careful not to overmix, as this can make the biscuits tough.