01 - Preheat oven to 400°F. Grease a 24-cup mini muffin tin thoroughly with melted butter or nonstick cooking spray.
02 - In a medium mixing bowl, whisk together flour, sugar, baking powder, baking soda, and salt until evenly blended.
03 - In a separate bowl, whisk buttermilk, egg, melted butter, and vanilla extract until completely smooth.
04 - Pour wet mixture into dry ingredients. Gently fold together until just combined, leaving small lumps intact. Avoid overmixing.
05 - Gently fold in chocolate chips or blueberries if desired.
06 - Spoon batter into prepared mini muffin cups, filling each about three-quarters full.
07 - Bake for 8 to 10 minutes until tops turn golden brown and a toothpick inserted in the center exits clean.
08 - Let cool in the pan for 2 minutes. Carefully remove poppers and serve warm with maple syrup, melted chocolate, or fruit preserves.