INGREDIENTS
6 tbsp
butter, softened
1 cup
granulated sugar
1 tbsp
lemon or lime zest
1/4 tsp
cinnamon
2
large eggs
1 tsp
vanilla extract
1 1/2 cups
all-purpose flour
1 tsp
baking powder
1/2 tsp
salt
2/3 cup
buttermilk
12 oz
fresh blueberries
1 tbsp
brown sugar