I was wondering if you remembered seeing any posts about making RKT to model with using homemade marshmallows. I live in Greece and the marshmallows here seem to be either stale or don't melt properly or just plain expensive. I make my own marshmallows regularly and thought I could just substitute the same weight - however, I added another 4 cups to the 6 cups and 10 ounces of marshmallow and its a sticky mess! I hope it might dry out over the next few hours. Any pointers?
Ok so I answered my own question. I made RKT using homemade marshmallows and it was a success!
I used the Martha Stewart recipe for the marshmallows (http://www.marthastewart.com/333971/homemade-marshmallows), followed it to the end, letting it set for an hour or so to make it easier to handle. I then measured 10 oz (283g) which is what a packet of store bought marshmallows would be. I remelted the marshmallows using only one tablespoon of butter. I then added the 6 cups of RK the original recipe calls for but found it was way too sticky. I ended up putting 10 cups and then mixing and letting it sit for a little. Then with well oiled hands I managed to shape it the way I wanted it.