Don't just stop at the batter and frosting when you're baking, because sprinkles are easy to make-at-home, too. Just a few simple ingredients from your pantry and a knack for mixing food coloring will give you jimmies, dots, and even hearts to have on hand for decorating any labor of love you've just baked up.
Special thanks to Alexis Murphy of Jac o' lyn Murphy for helping us test this recipe.
To make the sprinkle batter, sift together the confectioners’ sugar and cornstarch until there are no lumps. Slowly add the milk until you reach a thick enough consistency to pipe (similar to frosting). This will give you about ½ cup batter. At this point, separate the batter into small bowls if different colors are prefered, and color each differently with the food coloring.
To make jimmies: Using a 1/16-inch pastry tip for your pastry bag, pipe out long lines (in various colors) of the batter onto a parchment lined-baking sheet. Let the batter harden completely (about 24 hours), and then cut into jimmy-sized sprinkles, about ¼-inch thick.
To make circles: Using the same pastry tip, pipe out rows of dots (in various colors) and let dry.
To make hearts: Using the same pastry tip, draw tiny hearts onto the parchment.