2 egg cake (any scratch cake ok)
1 1/2 c. blueberries
1 c. sugar
3 tbsp. flour or 2 tbsp. cornstarch
2 c. boiling water
1/2 c. butter
1 tbsp. vanilla

Add blueberries to prepared cake mix. In sauce pan combine sugar, flour or cornstarch, boiling water and cook until thickens. Remove from heat; add butter and vanilla. Pour over cooked cake. Serve warm.