1 stick butter
3/4 c. milk
3/4 c. mayonnaise
1 lb. Velveeta
1 pkg. frozen O'Brien potatoes

Put potatoes in a greased cake pan. Add milk and mayonnaise, cubed Velveeta and butter on top of potatoes. Melt in oven. Stir together. Sprinkle with bacon bits on top. Bake at 350 degrees for 30 minutes or until brown.