Combine butter, flour, sugar, baking powder, cinnamon, and salt and mix until crumbly. Reserve 1/2 cup for topping. To the remaining mixture, add the combined eggs and milk. Mix well.
Pour into a greased and floured 8-inch square pan. Sprinkle with the reserved crumbs.
Bake in a moderate oven, 375°F for 30-35 minutes.
Serving Size: 12.