Why did my frosting turned out runny?

Why did my frosting turned out runny?

Frosting is too runny. This could be because the butter was too soft or you added too much milk if it is buttercream frosting or it could be that you have overbeaten it if you’re making cream cheese frosting. Cream cheese should always be full fat and should be used cold from the fridge.

How do you make buttercream frosting thicker?

Steps

Chill the frosting to thicken it without adding more ingredients.

Use powdered sugar to easily thicken the buttercream frosting.

Add cornstarch in 0.5 tsp (2.5 ml) increments to thicken sweet frosting.

Mix 1 US tbsp (15 ml) of butter into the frosting to thicken it without altering the taste.