Indulge in Gooey Triple Chocolate Marshmallow Crumble Bars—rich chocolate layers, fluffy marshmallows, and a crunchy crumble for the ultimate treat!

For the marshmallow, place all of the ingredients in a large bowl set over a pan of simmering water (make sure the bottom of the bowl does not touch the water), and whisk with an electric hand ...

Popular marshmallow flavors include mint chocolate chip ... There are about 16 marshmallow squares in a batch, and they take about six to 12 hours to make, depending on ingredients, Busick ...