Best Ever bettytarts Servings: 12 Ingredients - 12 tart shells - 1/4 cup butter - 1 cup brown sugar - 3 eggs - 1 cup corn sryup - 3 dashes salt    I bake these buttertarts ever week for the little restaurant I work at in Napnee, Ontario.   Directions Preheat oven 350 degrees. Line muffin pan with 12 tart shells. For the filling, mix the sugar, butter and 3 eggs. Add corn sryup and 3 dashes of salt. Mix well with a whisk. Pour into shells about 3/4 full. Bake for 27 minutes.	1