This is an old recipe for chocolate no-bake oatmeal cookies but it does not use pudding?? When I was in elementary school my school served these on our lunch trays when we had Chili and peanut butter and honey sandwiches. It may not be what you're looking for....but they are very good!
2 cups sugar
1/4 cup cocoa
1/2 cup milk
1/4 cup butter
1 tsp vanilla
1/2 cup peanut butter
3 cups quick rolled oats
pinch of salt

Combine sugar, cocoa, milk and butter in a pan and bring to a boil. Boil for one minute. Remove from heat. Add 1 tsp vanilla, 1/2 cup peanut butter, 3 cups rolled oats, and the pinch of salt. Stir thoroughly. When cool, drop by teaspoonfuls on waxed paper or greased cookie sheet.