Whisk flour, sugar, baking powder, baking soda, salt, and 1 cup mini chocolate chips in a bowl.
Whisk eggs and sour cream until smooth, then add vanilla, syrup, and oil.
Stir in melted butter and buttermilk.
Combine wet and dry mixtures just until combined. Do not overmix.
Cover and rest batter for 1 hour at room temp.
Preheat oven to 425°F. Line a 12-cup muffin tin with liners.
Gently scoop rested batter into liners. Top with sugar and chocolate chips.
Bake at 425°F for 8 min, then reduce to 350°F and bake 8–10 more min.
D=”instruction-step-9″>9. Cool for 10 min in pan, then move to rack. Serve warm.
