Berry Streusel Cake

Streusel
1 1/4 cups all-purpose flour
1/2 cup firmly packed light brown sugar
3/4 stick (6 tablespoons) butter, cut into pieces and softened
1 teaspoon cinnamon
1 tablespoon water
Cake batter
1 stick (1/2 cup) butter, softened
3/4 cup cane sugar
2 large eggs
2 tablespoons milk
1 teaspoon vanilla
1 1/4 cups all-purpose flour
1 teaspoon baking powder
1/2 teaspoon salt
5 cups blueberries, raspberries, or blackberries or combination

1. Heat oven to 350°F. Butter and flour a 9 x 13 baking pan.
2. In a food processor pulse together streusel ingredients until well combined and crumbly.
3. Beat butter with sugar until light and fluffy. Beat in eggs. Add vanilla and milk. Sift in flour with baking powder and salt and beat until smooth. Don’t overmix.
4. Spread cake batter in pan and sprinkle fruit evenly over it. Sprinkle streusel over fruit and bake for 1 hour, or until a tester comes out clean. Cool cake on a rack. Serve warm or at room temperature.