Blueberry Dessert - cooking recipe

Ingredients

1 qt. blueberries
1 1/4 c. sugar
1/4 c. butter, melted
1 tsp. vanilla
1 box yellow cake mix
1 (20 oz.) can pineapple

Preparation

Mix blueberries, sugar, butter and vanilla and spread in the bottom of a 9 x 13-inch Pyrex baking dish.
Mix the yellow cake mix with the pineapple and its juice.
Spread over the blueberries.
Bake at 350\u00b0 for 1 hour or until browned.