Hi Leigh, you can use the strawberry cream cheese frosting from this recipe for strawberry cake, and sub freeze-dried raspberries for the strawberries. Enjoy!

Hi Roberts, we’re so sorry to hear that and are happy to help troubleshoot. When cupcakes sink in the middle, it usually means that they are slightly under baked. Each oven can be a bit different, so you may need to extend the bake time by a minute or two. As for the bitterness, when you zested the lemon, did you accidentally get any of the white pith? That part of the lemon is quite bitter and may be contributing to the off flavor. Be sure, too, that your baking powder is fresh—expired or old baking powder could also be contributing to the sinking and bitter taste. Thank you for giving these a try!

Hi Lee, great question! You can learn all about the difference between salted and unsalted butter here. General rule of thumb: reduce or add 1/4 teaspoon of salt per 1/2 cup (1/4 lb; 8 Tbsp; 113g) of butter. Hope this helps!