These cookie dough bars are edible cookie dough filled with chocolate chips and M&M's, then topped with more chocolate and candy. A fun and unexpected dessert that takes just minutes to put together!

For cookie dough:
1/2 cup butter softened
3/4 cup brown sugar
1/2 teaspoon vanilla extract
2 cups all purpose flour see note about baking flour
14 ounce can sweetened condensed milk
1 cup miniature chocolate chips
1 cup miniature M&M's
cooking spray

For topping:
1 cup semisweet chocolate chips
2 tablespoons butter
3/4 cup miniature M&M's

Line an 8"x8" square pan with parchment paper or foil. Coat the parchment paper with cooking spray.
For the cookie dough: Place the butter and brown sugar in the bowl of a mixer and beat until fluffy. 
Add the vanilla and beat for one more minute.
Alternate between adding the flour and condensed milk, mixing on low speed until everything is combined and a dough forms.
Stir the chocolate chips and M&M's into the dough.
Spread the dough in an even layer in the prepared pan.
Place the bars in the freezer for 30 minutes.
To prepare the topping: Place the chocolate chips and butter in a bowl and microwave in 30 second increments until melted. Stir until smooth.
Spread the chocolate evenly over the cookie dough layer. Press the M&M's into the chocolate.
Chill the bars in the fridge for at least 2 hours. Keep chilled until ready to serve, then cut into squares and enjoy. Store any leftovers in the fridge.