Flatten two biscuits into thin circles. take 3 or 4 marshmallows (or 1 large marshmallow) and dip them into the melted butter and then roll in the cinnamon and sugar.
Place the marshmallows on one biscuit. Use the other flattened biscuit and sandwich the marshmallows in between the two biscuits.
Use a fork and pinch off the seam around the edge.
Repeat the above steps with the remaining marshmallows and biscuits. You should end up with 10 doughnuts.
Heat the oil (should be about an inch deep) in a non-stick frying pan over medium-high heat until hot.
While the oil is heating, make the glaze by mixing all ingredients together in a stand mixer or with handheld beaters until smooth. Set aside
When the oil is hot, fry the doughnuts for 30 seconds- 1 minute on each side or until golden brown.
Immediately glaze the doughnuts by putting the doughnut into the bowl of glaze and flipping it around a few times.
Transfer to a wire rack (that is inside of a cookie sheet!) to let the glaze dry.