1 pkg yellow cake mix
3/4 cup butter
2 1/2 cups quick oats
12 ounces preserves or jam
1 T water
Preheat oven to 375. Melt butter. Combine cake mix and oats in a large bowl; stir in the melted butter until the mixture is crumbly. Measure half of this mixture (about 3 cups) into a greased 13x9x2−inch pan. Press firmly into pan to cover the bottom.
Combine preserves and water; spoon over crumb mixture in pan, and spread evenly. Cover with remaining crumb mixture. Pat firmly to make top even.
Bake at 375 for 20 minutes−−top should be very light brown. Cool completely before cutting into bars.