Bon Appetit has one I've been making for years called Natchez Cookies..Rec inside.
Natchez Cookies
* 15 (about) whole graham crackers
* 1 cup (2 sticks) unsalted butter
* 1 cup firmly packed dark brown sugar
* 1 teaspoon vanilla extract
* 1 1/3 cups chopped toasted pecans
* 1 6 ounce package semisweet chocolate chips
Directions
1. Preheat oven to 350.
2. Lightly butter 11 x 17 inch cookie sheet.
3. Arrange graham crackers side by side, edges touching, on prepared cookie sheet.
4. Stir butter and brown sugar in heavy medium saucepan over medium heat until butter melts and sugar dissolves.
5. Mix in vanilla extract.
6. Increase heat and boil 1 minute.
7. Pour caramel mixture over graham crackers.
8. Sprinkle with chopped toasted pecans.
9. Bake until caramel topping bubbles and turns deep brown, about 10 minutes.
10. Remove from oven.
11. Immediately sprinkle chocolate chips over cookies. Cool 4 minutes.
12. Cut along graham cracker edges to separate. Carefully transfer to rack and cool completely. Cut each cookie in half.
13. (Can be prepared 1 day ahead. Store in airtight container at room temperature)
14. I have kept these in my freezer and nibbled on them for a couple of weeks. They kept very well.