First I used Sculpey Mold Maker. This stuff is soooo cool! It was $9.99 at Hobby Lobby, but I had one of those wonderful 40% off coupons. You cut a piece of this stuff out big enough to fit whatever shape you are trying to mold. As per Casey's tutorial (link is at the bottom) I used connector caps for electrical wiring. I got a bag of assorted sizes at Lowe's for about $2.50
I pushed the caps into the mold just far enough to get the shape of the bottom of a cupcake. I used the two smallest size connector caps. One size I think will be for cupcakes and the smaller one I will use for muffins. You bake the mold in a 275 degree oven for 20 minutes per 1/4 inch of thickness. Some people say not to use the same oven that you cook in, some say it's okay. It' really up to you - some people have those small countertop ovens and use those for clay only. I used an old flat pan that I didn't care to get clay on and I sprinkled it with cornmeal to make sure the mold wouldn't stick. 20 minutes was the perfect amount of time for my size mold.
I already had some Sculpey at home, but got a few more colors at Michael's yesterday. They were on sale 4/$5 so I thought that was pretty decent. I used a tiny bit of tomato red mixed with a ball of white and kneaded it together until it turned a pretty shade of pink. I also used a tiny bit of hazelnut mixed with white to get a tan cupcake sort of color.
And into the 275 degree oven went my cupcake. Don't you just love my 1970's oven? I do believe that was probably the last time it was cleaned. Kindly overlook the recyclables in the background - they're piling up for a trip to the bins this weekend. Since the cupcake was so small I only left it in the oven for 15 minutes. Clay directions vary - Sculpey says 15 minutes at 275 for 1/4 inch thickness while Premo says 30 minutes.