Ingredients:

  • 4 cups (packed lightly) Powdered Sugar (Icing Sugar), sifted
  • 3 Tbsp Meringue Powder (Essential stabilizer)
  • Pinch (approx. 0.6 g) Fine Sea Salt
  • 1/2 cup (120 ml) Warm Water (Filtered is best)
  • 1 tsp Clear Vanilla Extract
  • 1 Tbsp Light Corn Syrup (Optional, for shine)
  • Water, incremental additions (As needed for consistency adjustments)

Instructions:

  1. Sift and Combine Dry Ingredients: In the bowl of your stand mixer, thoroughly sift the powdered sugar, meringue powder, and salt. This step eliminates lumps and ensures a smooth finish.
  2. Initial Wet Mix: Add the 1/2 cup (120 ml) of warm water and the vanilla extract (and optional corn syrup, if using) to the dry ingredients.
  3. Mix on Low: Start mixing on the lowest speed for 1 minute until the mixture is fully incorporated. Scrape down the sides of the bowl using a rubber spatula.
  4. Whip to Stiff Peak: Increase the speed to medium-high and beat for 6 to 8 minutes. The mixture should become very thick, glossy, and form stiff peaks. This is the 'piping consistency' base.
  5. Check Consistency: Test a small amount: it should hold a defined line without slumping. If it seems too stiff, add water 1/2 teaspoon at a time until the desired stiff peak consistency is achieved.
  6. Divide and Colour: Transfer the stiff icing base into smaller bowls, one for each color you plan to use. Use concentrated gel or paste food coloring, never liquid drops.
  7. Reserve Piping Icing: Reserve about 1/3 of the colored icing at the stiff peak stage for outlining borders and intricate details. Load this into piping bags.
  8. Create Flooding Icing (The 10-Second Rule): For the remaining 2/3 of the icing, slowly add water, 1/4 teaspoon at a time, mixing well. The correct 'flooding consistency' is achieved when a line drawn through the icing disappears (flows back together) in approximately 10 to 12 seconds.
  9. Outline Cookies: Using the stiff piping icing, pipe an even outline around the edge of your cooled sugar cookies. Let this border dry for 5–10 minutes to act as a dam.
  10. Flood the Cookies: Carefully transfer the thinner flooding icing into squeeze bottles or piping bags. Fill the outlined areas quickly, using a toothpick or scribe tool to guide the icing to the edges and pop any air bubbles.
  11. Dry Thoroughly: Place the decorated cookies in a cool, dry area and leave them undisturbed for a minimum of 8 hours (preferably overnight). The icing must be fully set before stacking or packaging.