Preheat oven to 375F (190C)

Combine four, baking powder, 2 tsp cinnamon and salt in a bowl.

In a separate bowl whisk together melted butter, 1/2 cup sugar and egg until well blended. Stir in buttermilk and vanilla. Add to flour mixture and stir just until blended. Do not overmix.

Get your pan ready. Either put muffin liners into the muffin cups or spray with Pam. In a separate bowl mix together 2 tbsp sugar and 1/2 tsp cinnamon. Set aside.

Spoon 1 tbsp of batter into each muffin cup until all filled. Sprinkle the sugar/cinnamon mixture on top of the muffins.

Bake for 10-12 minutes or until muffins cooked through (test with toothpick). Remove from pan and cool on a rack.

These freeze nicely.