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Easy Watercolor Citrus Slice Cookies

Let me show you how to create vibrant, arresting, decorated watercolor citrus slice cookies with an easy watercolor decorating technique.

Round cookies that look like citrus slices, decorated with royal icing and edible paint.

EASY WATERCOLOR CITRUS SLICE COOKIES STEP-BY-STEP

The irresistibly refreshing appearance of lemons, oranges, limes, and grapefruits makes them excellent subjects for this easy and fun watercolor technique.

THINGS YOU NEED

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PREPARE COOKIES AND ROYAL ICING

For this project, I baked two sizes of round cookies using my classic cut-out sugar cookie recipe; however, you can use any cut-out cookie recipe of your choice. I paired it with citrusy royal icing – Fresh Lemon Royal Icing.

Glass jars with edible paint beside piping bag with icing.

ROYAL ICING COLORS AND CONSISTENCIES

  • White Icing: 15-second consistency (base), soft piping consistency (pith)
  • Yellow Icing, Orange Icing – soft piping consistency (skin)

FLOOD ROUND COOKIES

  • Trace the decorating guide onto a cookie with an edible marker. Prepare a cardstock template that is smaller than the cookie, or use a smaller round cutter (steps 1-2).
  • Outline and fill the cookie with 15-second consistency icing (steps 3-6).
  • Using a scribe tool or a toothpick, distribute and smooth the royal icing (step 7).
  • Allow icing to dry fully for about 8 hours.
Round cookie with white icing layer.

EDIBLE PAINT

To prepare edible paint, you’ll need concentrated gel food colorings, alcohol, and stain-resistant bowls or a food-only paint palette tray.

  • Into a paint palette, add a drop of gel food color: orange, yellow, pink.
  • Then add clear alcohol ( I used Everclear/grain alcohol). Stir well with a food-only paintbrush.
  • A little bit of residue forms in the edible paint as you stir it. This is normal. Pick up the residue with a paintbrush and rinse it off in water.
  • Have a piece of dry paper towel on hand to absorb excess paint from the paintbrush.
  • If you plan to use edible paint frequently, you can store it in glass jars with a dropper.
Plastic paint palette with edible paint.
Glass jars with a dropper filled with edible paint on a gray tray.

EASY WATERCOLOR EFFECT

Whenever you work with edible paints, make sure to protect your work surface and have some paper towels or kitchen towels on hand (step 1). In this beginner watercolor citrus cookies tutorial, I used a food wrap (step 2) and a sandwich bag (step 3) to create a spontaneous watercolor effect on royal icing.

Hand holding a food wrap and a sandwich bag.

WATERCOLOR ORANGE SLICE

  • To create a watercolor orange background, I used orange, lemon, and pink edible paint.
  • First, trim the zipper seal and layer a single layer plastic onto the protected work surface (steps 1-2).
  • Deposit drops of orange, yellow and pink edible paints onto the sheet (steps 3-4).
  • Add a couple of drops of clear alcohol to help the edible paint flow more smoothly (step 5).
  • Use a food-only paintbrush to disperse the paint loosely across the sheet, but don’t mix it too much (steps 7-8)
Glass dropper depositing color onto a plastic bag.
  • Carefully turn the sheet over and place it onto a dry white icing (steps 1-2).
  • Use your fingers to move the paint around the edges gently (steps 3-4).
  • Slowly remove the sheet (step 5).
  • Allow the liquid to evaporate completely and let the surface dry for about 20 minutes (step 6).
Sandwich bag with edible pain turned over on a round cookie with white icing.
  • Pipe the skin and the pith with soft piping consistency icing.
  • First, make an orange outline using a round piping tip #3 or #4 and then immediately pipe the white pith line using a round piping tip #2 or #3 (steps 1-2).
  • Continue piping the segment lines with white icing (steps 3-5).
  • Don’t wait for the icing to crust; immediately dip the icing into granulated sugar (step 6).
  • Icing will most likely get slightly pushed beyond the edge of the cookie. Use a palette knife or a two-in-one decorating tool to smooth the edge, making the icing flush with the cookie’s edge (step 7).
  • Allow to dry for a couple of hours.
Piping white citrus segment lines onto a cookie.
Decorated cookie with icing and painted with edible paint.

WATERCOLOR LEMON SLICE

  • To create a watercolor lemon background, I used primarily lemon and some orange edible paint.
  • Here you can see that instead of a smooth sandwich bag sheet, I used a double layer of food wrap.
  • Deposit drops of yellow and some orange edible paint onto a food wrap sheet (steps 1-6).
A small glass dropper depositing yellow and orange edible paint onto a food wrap.
  • Turn the sheet oven onto the dry icing, and use your fingers to spread the paint over the cookie gently. It’s okay if there are some white spots. (steps 1-5).
  • Remove the sheet and allow the cookies to air-dry for 20 minutes before continuing with the next step.
Food wrap with edible paint, pressed onto a cookie iced with white icing.
  • Use soft piping consistency icing to pipe the skin and the pith. Notice I’m using a tipless piping bag without a tip. You can see it’s possible without the piping tips, too. (steps 1-4).
  • Turn the cookie onto the granulated sugar to coat the skin, pith, and segment icing lines with sugar (steps 5-6).
  • Clean up the edge of the cookie as needed by gently pushing the icing that has oozed to make it flush with the cookie’s edge.
Outlining cookie with icing and dipping it into granulated sugar.

Small round cookies decorated with watercolor technique.

CREATIVE PACKAGING IDEA

If you’re unsure how to package the cookies, I suggest this quick and easy, adorable cookie packaging idea using cookie tags.

Stacked round cookies on a white background.

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