01 - Preheat oven to 400°F. Grease a 24-cup mini muffin tin with melted butter or nonstick spray.
02 - In a medium bowl, whisk together flour, sugar, baking powder, baking soda, and salt until well blended.
03 - In a separate bowl, whisk together buttermilk, egg, melted butter, and vanilla extract until smooth.
04 - Pour wet ingredients into dry ingredients and mix gently until just combined. Do not overmix; a few lumps are acceptable.
05 - Gently fold in chocolate chips or blueberries if desired.
06 - Spoon batter evenly into prepared mini muffin tin, filling each cup about three-quarters full.
07 - Bake for 8 to 10 minutes until tops are golden and a toothpick inserted in the center comes out clean.
08 - Let cool for 2 minutes, then carefully remove poppers from tin. Serve warm with maple syrup, melted chocolate, or fruit preserves.