Dani Fiore makes sugar cookie hearts topped with sweet Valentine's Day sayings.
On a clean surface, roll out fondant. Using small letter-shaped cookie cutters, cut out desired letters; set aside until dried, about 10 minutes.
Meanwhile, mix together half of the royal icing with the red or pink food coloring until desired shade is reached. Transfer to a small squirt bottle with a wide tip. Leaving 1/4-inch border, outline the heart shaped cookie with colored icing. Draw several zigzags across entire surface of the outlined area. If necessary, use a toothpick to spread evenly. Add letters and sprinkle with sanding sugar, if desired. Let dry.
Mix together remaining royal icing with white food coloring. Transfer to a small squirt bottle. Outline colored area of heart with white icing. Add candy-coated chocolates, mini marshmallows, gumdrops, or Red Hots. Let dry.