Ingredients

1/4

cup all-purpose flour

1/4

cup sugar

1/2

teaspoon cinnamon

3

tablespoons margarine or butter

2

tablespoons fine, dry bread crumbs

2

cups all-purpose flour

1

cup sugar

3

teaspoons baking powder

1/2

teaspoon baking soda

1/2

teaspoon salt

1/2

teaspoon cinnamon

1

cup fresh or frozen blueberries, thawed, drained

2

eggs

1/3

cup orange-flavored liqueur or orange juice

1/4

cup margarine or butter, melted, cooled

1

(8-oz.) container sour cream

1

teaspoon grated orange peel

Preparation

In small bowl, combine all topping ingredients except margarine; mix well. With pastry blender or fork, cut in 3 tablespoons margarine until mixture resembles coarse crumbs. Set aside.

Heat oven to 375°F. Grease 10-inch springform pan or 9-inch square pan. Sprinkle with bread crumbs. In large bowl, combine 2 cups flour, 1 cup sugar, baking powder, baking soda, salt and 1/2 teaspoon cinnamon; mix well. Stir in blueberries.

Beat eggs in medium bowl. Stir in orange liqueur, 1/4 cup margarine, sour cream and orange peel. Add to blueberry mixture; stir just until dry ingredients are moistened. Spoon batter into greased pan. Sprinkle with topping.

Bake at 375°F. for 35 to 45 minutes or until toothpick inserted in center comes out clean. Cool 10 minutes; remove sides of pan. Serve warm or cool.