Sedimentary Rock Bars...
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhw5cCkSwxs38oarO08-JxCczV1cZl37zd0eSkSuJRYbedF4N2o8mi6nxHDzPneyPtJ8HE77b2B69GjYoLN670E3555Unc3Oy1Y4N_63tM0QgdW0J8mG55L87DmdnW0dUrsq5vPjVAQ4b0a/s400/Sedimentary+Rock+Snacks.jpg)
For our bars, I used a package of Betty Crocker Peanut Butter Cookie Mix and pressed it into the bottom of a 9 x 13 pan. Bake at 325 degrees for 12 minutes. Remove from oven and sprinkle 1 Cup chocolate chips on top. Let melt and carefully spread to evenly distribute over the cookie. Then, I baked up some oatmeal cookies and crumbled them on top. For the top layer, I sprinkled on a mixture of butterscotch chips, white chocolate chips and toffee bits (can you tell I was cleaning out the pantry??!).
As I said before, you can make any type of layered cookie bar then have some fun talking about how sedimentary rocks are formed. Have fun and rock on!