Preheat oven to 400 levels F (200 levels C). Grease a 9×11-dawdle baking pan.
Mix 2 cups baking combine, boysenberries, milk, egg, 2 tablespoons brown sugar, and vanilla extract in a bowl till batter is moist, about 30 seconds. Pour batter into baking pan.
Mix 1/3 cup baking combine, 1/3 cup brown sugar, and ground cinnamon in a bowl; cut befriend in 2 tablespoons butter with a fork, till combination resembles erroneous crumbles. Sprinkle crumbles over the batter till lined.
Bake within the preheated oven till a toothpick comes out shipshape, 20 to 25 minutes.
Any berry range could moreover moreover be utilized in space of boysenberries, if desired.
Water could moreover moreover be substituted for milk.
White sugar could moreover moreover be substituted for brown sugar within the cake recipe.
It is an exact conception to position a baking sheet under the pie plate as overflow could moreover occur.