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Sugar Cookie Icing Recipe: The Ultimate Bakery-Perfect Glaze Experience Masterpiece

A smooth, glossy icing perfect for decorating sugar cookies. This simple recipe creates the ideal consistency for both flooding and detailing, with a touch of lemon for balanced flavor.  
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Prep Time 10 minutes
Total Time 10 minutes
Servings: 1 cup of icing (enough for 12-24 cookies depending on size)
Course: Desserts
Cuisine: American
Ingredients Method Notes

Ingredients
  

  • 1 cup 125 g confectioners' sugar
  • 1-2 tablespoons whole milk
  • 1 tablespoon light corn syrup
  • 1-3 drops lemon juice

Method
 

  1. Prepare the Sugar: Sift the confectioners' sugar into a bowl to remove any lumps, ensuring a smooth icing texture. This step is crucial as even small lumps can clog piping tips and create an uneven surface on your decorated cookies.
  2. Combine Ingredients: In a medium bowl, add the sifted confectioners' sugar, 1 tablespoon of milk, corn syrup, and 1 drop of lemon juice. Mix until all ingredients are thoroughly combined and no dry sugar remains. The corn syrup gives the icing a beautiful shine once dried.
  3. Adjust Consistency: Add more milk and/or lemon juice gradually, a little at a time, until you achieve your desired consistency. For outlining cookies, the icing should be thicker (like toothpaste), while for flooding (filling in outlined areas), it should be thinner (like honey). Test the consistency by lifting your spoon - the icing should flow off smoothly and a line drawn through it should disappear within 10-15 seconds for flooding consistency.

Notes

  • For colored icing, add gel food coloring rather than liquid food coloring to maintain the proper consistency.
  • Allow decorated cookies to dry completely (8-12 hours) before stacking or storing.
  • The icing will form a crust after about 30 minutes but will remain slightly soft underneath for 24 hours.
  • Store unused icing in an airtight container at room temperature for up to 3 days, or refrigerate for up to a week. You may need to re-stir or add a drop of milk before using again.