01 -
Set your oven to 350°F. Give a 9-inch pie pan a light coat of non-stick spray and put it aside.
02 -
In a big bowl, beat together the butter and sugar with a hand mixer on medium-high for about 1-2 minutes until it's fluffy and pale.
03 -
Mix in the egg and vanilla extract with the butter mixture until everything's smooth and combined.
04 -
Toss the flour, graham cracker crumbs, salt, and baking powder into the wet mixture. Stir until it forms a dough. Split the dough into two parts.
05 -
Take half the dough and push it evenly into the bottom and up the sides of your prepared pie pan.
06 -
Spread an even layer of marshmallow fluff all over the bottom crust.
07 -
Sprinkle most of the chopped chocolate bars over the marshmallow layer, saving ⅓ cup for later.
08 -
Scatter ⅔ cup of mini marshmallows over the chocolate pieces.
09 -
Grab the other half of the crust dough, press it into a disc about 9 inches wide using parchment paper, and get it ready for the pie.
10 -
Carefully place the top crust over the pie and press along the edges to join the top and bottom crusts together.
11 -
Pop the pie into your hot oven and bake for 10 minutes. Pull it out but don't turn the oven off.
12 -
Sprinkle the saved ⅓ cup mini marshmallows and ⅓ cup of chocolate over the top of the warm crust.
13 -
Put the pie back in the oven and bake for another 8-10 minutes, or until everything’s melted and the edges of the crust are golden brown.
14 -
Let the finished pie cool on the counter for about 45 minutes to an hour. Slice it once it's cool enough to hold its shape, or serve warm if you don’t mind it being a bit gooey.