Plum Buckle - cooking recipe

Ingredients

7 cups pitted and quartered plums
2/3 cup butter, softened
1 1/2 cups white sugar
2 eggs
3 cups sifted all-purpose flour
1 tablespoon baking powder
1/2 teaspoon salt
2 cups milk
2 teaspoons vanilla extract
1 cup white sugar
1/2 cup butter, softened
1/4 cup all-purpose flour
1 teaspoon cinnamon

Preparation

Preheat oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking dish.
Place the plums into the bottom of the prepared baking dish. In a large bowl, mash together 2/3 cup butter with 1 1/2 cup of white sugar until the mixture is smooth and creamy. Beat in eggs, one at a time. Stir in 3 cups of flour, the baking powder, and salt. Mix in the milk and vanilla extract to make a smooth batter. Pour the batter over the plums. Mix 1 cup of sugar, 1/2 cup of butter, 1/4 cup of flour, and cinnamon together in a bowl to make a crumbly topping; spread over the batter.
Bake in the preheated oven until a toothpick inserted in the center of the cake comes out clean, 45 to 50 minutes.