Easy Sugar Cookie Icing

Featured in Sweet Treats for Any Day.

Make thick or thin icing for decorating cookies fast. Perfect for creating polished, professional-looking desserts.
Una donna con un cappello a coda di cavallo e un vestito nero.
Updated on Sun, 13 Apr 2025 11:10:24 GMT
Star cookies topped with colorful icing and sprinkled with tiny, vibrant star shapes. Pin it
Star cookies topped with colorful icing and sprinkled with tiny, vibrant star shapes. | kylierecipes.com

I've gotta share my top sugar cookie frosting that transforms plain cookies into stunning treats. Through many test runs and kitchen experiments, I've nailed this glossy topping that gives a pro finish while tasting incredible. It's become what I use for all celebrations, from Christmas to birthdays.

The Secret To Stunning Icing

What makes this so great is how adaptable it is once you get the hang of it. I combine a solid foundation of confectioners sugar, mix in milk until it flows just right, add corn syrup for that gleam, and vanilla for amazing taste. Your cookies will look and taste totally different after trying this.

What You'll Need

  • Powdered Sugar: Double-sift 4 cups for ultra-smooth results.
  • Milk: Begin with 5 tablespoons and tweak as you go.
  • Corn Syrup: The hidden trick for that gorgeous shine.
  • Vanilla Extract: Go with clear for pure white frosting or regular for warmth.
  • Food Coloring: Stick with gel types—they won't make your icing runny.

Creating Your Masterpiece

Border Work First
Reserve roughly a third of your icing at a thicker texture. This creates the dam that keeps everything contained.
Flowing Fill Icing
Gradually add milk to the remaining portion until it flows like warm honey. When dropped, it should sink back in around 8-10 seconds.
Making It Colorful
Stick with gel colorants—they pack more punch without thinning your mixture.
A plate of decorated star-shaped cookies in various pastel colors, topped with sparkling icing and edible decorations. Pin it
A plate of decorated star-shaped cookies in various pastel colors, topped with sparkling icing and edible decorations. | kylierecipes.com

Decorating Steps

This is the fun bit! Get your piping bags ready, but don't fill them more than halfway—they're much easier to handle when not completely full. Begin with the thicker border icing, taking your time around each cookie edge. After it firms up slightly, pour the thinner icing into the middle. It'll spread beautifully! Grab a toothpick to guide the icing into any tricky spots.

Personal Touches

Now's when you can get really creative. Fancy some mint flavor? Just add a tiny bit of peppermint extract. Into citrus? Try some lemon flavor. I've done these with almond for fancy wedding treats. And the colors are endless! My children always want to help mix shades—just remember that gel colors give the most vibrant look.

Storage Tips

One key thing I found out through mistakes: always let your beautiful cookies dry completely for 24 hours before you stack them. They'll stay good in an airtight box for about seven days—assuming they don't vanish before then! They also freeze wonderfully. I often prep holiday cookies weeks ahead and just thaw them when company's coming.

Foolproof Results

The reason I can't get enough of this icing is simple: it always works! It's easy enough for newcomers but flexible for detailed work too. The texture hits that sweet spot—not too liquid, not too firm. And it dries with this lovely subtle glow that makes homemade cookies look totally professional.

Insider Tips

After tons of decorating sessions, I've learned to always add your liquids bit by bit—you can always thin icing but making it thicker is tough. Keep water in a spray bottle nearby to stop crusting while you work. And my favorite tip? Test your piping designs on wax paper first—you can just scoop it back into your bowl!

Creative Variations

I love playing with different flavors—sometimes adding almond for fancy cookies or lemon zest for brightness. My newest trick? Swapping honey for corn syrup works amazingly well. For birthday cookies, I sprinkle some edible shimmer dust while the icing's still wet—it creates such a wonderful effect!

A plate of star-shaped cookies decorated with colorful icing and sprinkles in shades of blue, pink, and white. Pin it
A plate of star-shaped cookies decorated with colorful icing and sprinkles in shades of blue, pink, and white. | kylierecipes.com

Frequently Asked Questions

→ How can I tell if my icing is ready?
Thick icing should hold its shape for a few seconds before blending. For thinner icing, it should quickly smooth out after drizzling.
→ Is it okay to make this in advance?
Yes! Keep it sealed in the fridge. Let it warm up a bit and stir well before you use it. Add milk if it's too thick.
→ What’s corn syrup for?
It adds shine and helps it dry faster. Skip it and use extra milk if you want, but the icing may dry duller.
→ When can I stack the cookies?
Leave cookies out to dry completely for around 20-24 hours. This keeps the icing from getting messed up.
→ Can I swap milk for water?
Sure, you can use the same amount of water. Any milk works too, including almond or other dairy-free options.

Sugar Cookie Icing

Quick icing that’s great for both outlining and filling cookies. Perfect for decorating festive treats or special celebrations.

Prep Time
15 Minutes
Cook Time
~
Total Time
15 Minutes
By: Kylie

Category: Desserts

Difficulty: Intermediate

Cuisine: Baking

Yield: 24 Servings (1 3/4 cups icing)

Dietary: Vegetarian, Gluten-Free

Ingredients

01 75-90ml (5-6 tablespoons) milk
02 1 teaspoon vanilla extract (clear)
03 Optional: Food coloring
04 4 teaspoons light corn syrup
05 480g (4 cups) powdered sugar

Instructions

Step 01

Stir together powdered sugar, 5 tablespoons milk, corn syrup, and vanilla till the mixture feels silky.

Step 02

Slowly mix in a bit of milk until a ribbon of icing collapses after 3-4 seconds. Pull out one-third for outlining.

Step 03

For the rest of the icing, stir in extra milk until it melts into the rest of the bowl right away.

Step 04

If you want, mix food coloring into both batches of icing for creativity.

Step 05

Draw outlines first with the thick icing, then flood the inside with the thinner version. Fill gaps using a toothpick if needed.

Step 06

Leave the cookies untouched to dry for 20 to 24 hours if stacking them.

Notes

  1. Yields about 1 3/4 cups of icing
  2. Store in the fridge if making it ahead of time
  3. Corn syrup creates a glossy finish

Tools You'll Need

  • Mixing bowl (large)
  • Icing bags

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains dairy (due to milk)

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 85
  • Total Fat: ~
  • Total Carbohydrate: 22 g
  • Protein: ~