01 - Preheat oven to 400°F. Grease a 24-cup mini muffin tin thoroughly with melted butter or nonstick cooking spray to ensure easy release.
02 - In a medium mixing 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 completely smooth and incorporated.
04 - Pour wet ingredients into dry ingredients. Mix gently with a spatula or whisk just until combined—do not overmix. Small lumps in the batter are normal and desirable for fluffy poppers.
05 - Fold in chocolate chips or blueberries if desired, using just 2-3 folds to distribute evenly without deflating the batter.
06 - Spoon batter evenly into prepared mini muffin cups, filling each approximately three-quarters full. A small cookie scoop works well for consistent portioning.
07 - Bake for 8-10 minutes until tops are golden brown and a toothpick inserted into the center comes out clean. Avoid opening the oven door during the first 6 minutes.
08 - Let poppers cool in the tin for 2 minutes, then carefully remove. Serve warm with maple syrup, melted chocolate, or fruit preserves for dipping.