Buttercream Frosting For Cookies That Hardens

How to make buttercream frosting that hardens? I’ve tried adding gelatin or agar powder but it didn’t really work. Buttercream frosting is delicious and versatile. It can be used for cakes, cupcakes, cookies, pies, etc. The problem is that it tends to get soft after being refrigerated. This makes it difficult to spread evenly over …

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