1 lb fresh strawberries, sliced 1/4 c
+ 3 tbsp sugar, divided 2
containers (6
oz each) fat - free Greek - style yogurt, divided 1 c
+ 2 tbsp all - purpose flour 1/4 c
+ 2 tbsp whole wheat flour 2 1/4 tsp baking powder 1/4 tsp baking soda 1/4 tsp salt 3 tbsp chilled unsalted butter, cut in 1/4» pieces 3/4 tsp vanilla extract