3/4 cup butter, softened
1 1/4 cups sugar
1 tsp vanilla
3 large eggs
1 1/2 cups all-purpose flour
1 tsp baking powder
1/2 tsp salt
1/2 tsp cinnamon
1 can (8-oz) crushed pineapple in its own juice, well drained
2 oz (2 squares) unsweetened chocolate, melted
1/2 cup chopped nuts
Heat oven to 375 degrees.
In a large mixing bowl beat the butter and sugar until light and fluffy. Add the vanilla and eggs and blend well. Add the flour, baking powder, salt, and cinnamon, mixing well.
Place 1 cup of the batter in a small bowl; stir in the well drained pineapple; set aside.
Add the chocolate and nuts to the batter still in the bowl; mix well.
Spread half of the chocolate batter into an ungreased 9 x 9-inch baking pan. Spoon the pineapple batter evenly over the chocolate batter, spreading carefully. Spoon the remaining chocolate batter over the pineapple layer, spreading to cover.
Bake at 375 degrees for 35 to 45 minutes or until a wooden toothpick inserted in the center comes out clean. Cool completely. Cut into bars.