In a large bowl mix together butter and sugar at medium speed until light and fluffy. About 3-4 minutes.
Stir in oats, flour, graham cracker crumbs, baking powder and salt.
Beat until combined
Press 2/3 of mixture into bottom of a 10" cast iron skillet.
Top with marshmallows and chocolate chips.
Crumble remaining mixture on top.
Bake for 20-25 minutes or until golden brown.
Cool 10 minutes and enjoy!
Top with ice cream and chocolate syrup.
Video
Notes
Chocolate – I use semi sweet chocolate but you can use milk chocolate or dark chocolate. If you don't have chocolate chips you can also chop up a Hershey's chocolate bars or any favorite candy bar.
Marshmallows – I prefer using mini marshmallows for this s'mores dip but you can also use large ones.
Peanut butter – Peanut butter and chocolate are a perfect combo. You can use chopped up Reese peanut butter cups instead of chocolate chips or add in some peanut butter chips along with the chocolate chips. Replace half the chocolate chips with peanut butter chips.
Caramel – If you are a caramel fan, replace half of the chocolate chips with caramel bits or drizzle caramel sauce over the top of the s'mores skillet after it is done baking.