Whisk flour with sugar, baking powder and salt in a small bowl.
Whisk milk with oil, eggs and vanilla in large bowl.
Whisk in flour mixture until combined.
Stir in 10 chopped caramel butter cookies.
Scrape mixture into a well-oiled 10-inch cast iron skillet,
smoothing top.
Set pan over a grill on medium, lid closed, or on
a campfire grill, covered, until a tester inserted into centre
of cake comes out clean, 30 to 40 minutes.
Immediately sprinkle with marshmallows.
Let stand to cool slightly, then top with remaining
6 chopped cookies and strawberries.
Tip
Shortcake can be baked in centre of a 350F oven, 40 min.
Camping? For easy travelling and cleanup, whisk then store
dry ingredients and prepared shortcake toppings
in reseal able bags.