1 pkg. (13.5 oz.) blueberry muffin mix
1 can (1 lb. 5 oz.) blueberry pie filling
1 tbsp. lemon juice
1 tsp. cinnamon
Whipped cream or ice cream, optional

Heat oven to 400 degrees. Drain blueberries from muffin mix, reserving liquid. Stir together the reserved liquid, pie filling, lemon juice and cinnamon; heat to boiling. Pour into ungreased square pan (9 x 9 x 2 inches).

Prepare mix as directed on package except spread butter evenly over the hot pie filling. Bake 25-30 minutes. May be served with whipped cream or ice cream.