1. Preheat oven to 350. Lightly oil 9x13 pan.

2. combine block one, use a fork to break up the butter and form a crumble texture

3. combine berries and flour. toss gently to coat

4. use a hand mixer to combine the butter and sugar, beating until fluffy

5. continue to use hand mixer to blend in the vanilla, milk and yogurt.

6. add the dry ingredients to the wet and use a spatula to fold the ingredients together. Add berries and gently fold.

7. spread the batter evenly into the pan, top with streusel. Bake 45-50 minutes until tester knife comes out clean

8. after cooling 30 minutes, make 2 cuts lengthwise and three cuts widthwise to get 12 pieces.