I made the blue water icing a couple days before making the cake. Blue gel food coloring. My Favorite Autumn Blue Color Semi Sweet Designs Icing Colors Frosting Colors Blue Icing Add most of the water and mix until smooth. How to make blue icing . Videos you watch may be added to the TVs watch history and influence TV recommendations. Again frosting always darkens over time. Red cabbage is the most common natural blue food coloring here in the States. Using an electric mixer beat butter and powdered sugar until creamy. A single batch will give you approximately 2 12 cups of frosting Add 2 drops of Blue food coloring and mix the food coloring with a spoon as opposed to using the mixer. If the frosting is not dark enough add another 5. How to Make Navy blue Icing. 1 tablespoon corn starch. Step by Step Instructions Step One. That only affects intensity. Make a batch of our Best Buttercream Frosting. It keeps very well in a container in the fridge and just n...