Step 1

Preheat the oven to 350°.

Step 2

Mix brown sugar, oil, vanilla and egg together.

Step 3

In a separate bowl, combine the flour, oatmeal, salt and baking soda.

Step 4

Combine the two mixtures.

Step 5

Separate the dough in half and pack one half of the dough into a greased 9X13 pan.

Step 6

Sprinkle chocolate chips over the dough and then sprinkle the marshmallows on top.

Step 7

Crumble the remaining dough on top and bake for 12-15 minutes.

Step 8

I think these taste better warm, but they are a little bit crumbly at that point so you may need to eat them with a spoon! Enjoy!