To make brown icing, add brown color to your white frosting with a toothpick. Mix in the color until it is uniformly spread through the frosting. If you require a deeper shade of brown, add icing color to your mixture.
- Mix in gel color
Make sure to use frosting colors with a concentrated, gel-like consistency, as generic food colors will dilute the frosting. Use a toothpick to scoop out the desired frosting color, as gel colors are potent and a little can go a long way. Stir in the color with a spatula. If you require more color, remember to dip a new toothpick into the brown color.
- Begin with chocolate frosting
If you need a very deep shade of brown for the frosting, start with chocolate frosting and add brown color with a toothpick. Deep colors are only recommended for smaller accent areas of your cake or cookie, as adding a large amount of gel food color can alter the taste of your frosting.
- Omit the acid
Dissolve brown color in water before adding it to the frosting in order to eliminate a possible green undertone. Omitting lemon juice and cream of tartar from the recipe will also reduce the green undertone in brown icing.