Cookie butter can be compared to Nutella – only it is flavored like sugar cookies, not hazelnuts and chocolate. Either way, it is just as tasty, and just as versatile. Take these cookie butter filled cupcakes for example. They are made from a simple vanilla cake recipe (turned into cupcakes, of course). Once they have been baked and have had a chance to cool, they are filled with a special cookie butter filling and topped off with cookie butter frosting. There is no such thing as too much cookie butter!
Source The Art of the Cookie