Yes, frosting can set firm depending on the type of frosting and the ingredients used. Buttercream frosting, for example, can set firm when chilled, making it easier to work with and hold its shape when decorating cakes and cupcakes. On the other hand, some types of glazes or icings may not set as firm and will remain more fluid or glossy. It's important to follow the specific recipe instructions for the type of frosting you are using to achieve the desired consistency. **

Cake frosting is typically made by combining butter, powdered sugar, and flavorings such as vanilla extract or cocoa powder. These ingredients are mixed together until smooth and creamy, often using an electric mixer. Additional ingredients like milk or heavy cream may be added to achieve the desired consistency. The frosting can then be spread onto the cake or piped onto cupcakes using a pastry bag. **

To determine if the frosting is too liquid, you can check its consistency by observing if it easily drips off a spoon or if it appears runny. If the frosting is too liquid, you can try adding more powdered sugar to thicken it or refrigerating it for a short period to help it set. Additionally, you can also try adding a small amount of cornstarch or cream cheese to help thicken the frosting. **

The best frosting for cupcakes is subjective and depends on personal preference. Some popular options include classic buttercream frosting, cream cheese frosting, and chocolate ganache. Ultimately, the best frosting is one that complements the flavor of the cupcake and satisfies your taste buds. **

One can further process frosting by adding flavorings such as vanilla extract, almond extract, or citrus zest to enhance the taste. Additionally, food coloring can be added to achieve different colors for decorative purposes. For a lighter and fluffier texture, the frosting can be whipped with a hand mixer or stand mixer. Finally, the consistency of the frosting can be adjusted by adding more powdered sugar for a thicker frosting or a small amount of milk or cream for a thinner consistency. **

Cupcake frosting can be shelf-stable for several days if stored properly in an airtight container at room temperature. However, if the frosting contains perishable ingredients such as cream cheese or milk, it should be refrigerated and can typically last for about 3-5 days. It's important to check the expiration date on the packaging and to follow any specific storage instructions provided by the manufacturer to ensure the frosting remains safe to consume. **

Fondant can stick to cream cheese frosting, but it may not adhere as well as it does to other types of frosting. Cream cheese frosting tends to be softer and more moist than other frostings, which can make it more challenging for fondant to stick to. To help the fondant adhere better, you can try chilling the frosted cake before applying the fondant, or lightly brushing the frosting with a simple syrup or water to create a tacky surface for the fondant to stick to. **

To make the frosting firm, you can add more powdered sugar gradually until you reach the desired consistency. Another option is to add a small amount of cornstarch or cream of tartar to help thicken the frosting. Additionally, refrigerating the frosting for a short period of time can also help it firm up. **