Sugar cubes in fun shapes (like hearts) can be very expensive to purchase. Make your own and customize them in any color you love.
Additional Tips: Though it may be tempting, don't add any additional water to this recipe. Too much water could dissolve your sugar.
Wilton Icing Colors are super concentrated so I normally just dip a toothpick into the color and then into my recipe. If you need more, use the other end of the tooth pick or a new one to avoid getting any sugar into your Wilton color icing.
If a cube breaks when you're turning them out, just firmly press the sugar back into the mold and turn it out again. This recipe makes approximately 8 sugar cubes so just double or triple the recipe to make the number you need.