I purchased this Mouse-Chan Fuwa Fuwa paper clay set for $16.80 at JBOX to make the miniature food. It came with clay along with a mold to make all the food you see in the picture above.
Don't want to purchase a kit or buy online, I've got your back.
Supplies you will need:
Paper clay - It can be purchased at the craft store. I know Crayola sells it under the name Model Magic. You can mix different colored clay to get the desired color you want. Example red + white = pink.
*Molds - Can be purchased at the craft store in the clay section. Also, check the baking section for candy molds. They're often tiny and come in all kinds of shapes. The draw back to this is they're not as flexible making it a little more challenging to get the clay out.
Rub a little vegetable oil with a cloth onto your mold. Add Paper clay. Close up mold.
Open mold. Carefully pop out clay by gently pressing the mold. A toothpick is helpful to get the clay out as well.
How To Make Piped Frosting
Assemble all your pieces. I recommend gluing everything together because the clay is so fragile. Let dry overnight. Done.
This project is cross-posted over at Must Have Cute (other site I write for).