Fourth of July S'mores Bars

Last year Over the Big Moon posted this fabulous recipe for Fourth of July S'mores Bars. I'm always looking for new S'mores recipes, and the addition of Red, White, and Blue M&Ms (available everywhere!) makes it so festive. Happy Fourth. These bars are perfect for the barbecue, camping, or taking to friends.

FOURTH OF JULY S'MORES BARS

Ingredients:
1 package of Oreos, crushed into fine crumbs
1/2 cup unsalted butter, melted
1 can sweetened condensed milk
7 graham cracker squares (just enough to create a layer in pan)
3 – 8 oz ounce bars of milk chocolate (for that 'real' S'mores flavor)
4 cups mini marshmallows
2 cups Red, White and Blue M&M's

Directions: 
Preheat oven to 350 degrees.
Line 9 x 13 pan with aluminum foil, leaving a bit of an overhang.
Crush Oreo Cookies into fine crumbs. Combine crushed oreos with melted butter. Press oreo mixture into the bottom of 9×13 pan.
Pour sweet condensed milk over oreo crust.
Break up graham crackers and chocolate bar and sprinkle over sweet condensed milk.
Sprinkle mini marshmallows all over.
Bake for 30-35 minutes.
Remove from oven and immediately sprinkle all over top with M&Ms.
Put back in oven and cook for 5-7 more minutes.
Remove from oven and cool for 15 minutes.
While the bars are cooling, break up the last 4 ounce chocolate bar and melt with 3 tablespoons milk on stove top until chocolate is runny enough to drizzle over bars. If needed, add more milk.
After bars are cooled, drizzle milk chocolate over top of bars.
Finish cooling before serving!