(I used glucose.. found at hobby shops or specialty cooking stores)
2 eggs
2 tsp clear vanilla extract
2 1/2 cups bread flour*
2/3 cup milk powder
2 tsp cream of tartar
1 tsp baking soda
1 1/4 tsp kosher salt
1/4 cup rainbow sprinkles (jimmies)
Instructions
Combine butter, sugar and corn syrup or glucose in the bowl of your mixer, fitted with a paddle attachment. Cream together on medium high for 2-3 minutes, scraping down the sides of the bowl.
Add in the eggs one at a time and then add in the vanilla. Beat for 7-8 minutes. This is an important step… the dough needs to “rise” and fluff”.
Reduce the mixer speed to low and add the bread flour (*bread flour is used because of its high protein content.. it helps when large amounts of butter are used), milk powder, cream of tartar, baking soda, salt and rainbow sprinkles. Mix only until the dough comes together.. overmixing the dough makes one tough cookie! It will come together very quickly, so don’t leave it alone. Scrape down the sides of the bowl.
Still on low speed, add the Birthday Cake Crumbs (recipe below) and mix in for 30 seconds – just until they are incorporated.
Using any size scoop you wish, (they use 1/3 cup), portion the dough onto parchment lined cookie sheets. Pat the tops until the domes are flat.
*Wrap up the pans with plastic wrap and store in the fridge for a minimum of one hour or up to one week. Do NOT bake these cookies straight away as they will flatten in the oven.
Heat the oven to 350° F.
Arrange chilled dough with a good space between them (they still spread) on a parchment or silpat lined cookie sheet. Bake for 18 minutes (I baked for only 12… so watch them closely according to your oven’s temperature). The centers will be just beginning to color and the edges will have browned. Overcooking makes a crunchy cookie.
Cool the cookies on the sheet completely then transfer to a rack or airtight container for storage. At room temperature these cookies will keep for 5 days.
Recipe by Just a Smidgen at https://justasmidgen.com/2012/04/05/momofuku-funfetti-cookies/