Blueberry Buckle Coffee Cake

Mix together:
¾ c. sugar
¼ c. butter

Add:
1 egg

Add:
½ c. milk
3 scoops plain yogurt
1 tsp. vanilla

2 tsp. baking powder
2 c. flour
½ tsp. salt  

Fold in about 1 cup blueberries

Pour in 9X9” square pan or make into muffins

Topping:

Mix together:
½ c. sugar
1/3 c. flour
½ tsp. cinnamon
1’4 c. butter
¼ c. brown sugar

Crumble on top

Bake 350 for 40 minutes