29 Square Cookie Decorating Ideas That Are Fun and Modern -

Decorating cookies is honestly one of those little joys that can make any day feel special. Square cookies? Super versatile—there’s just something about those neat edges that makes them a blank canvas for all sorts of wild or pretty ideas.

Close-up view of several square sugar cookies decorated with colorful icing, arranged neatly on a plain background.

Here are decorating ideas to help you make square cookies that are as unique as you are. Whether you’re a total newbie or a seasoned baker, you’ll probably find something here to try out for a party, holiday, or just a random Tuesday.

Colorful Plaid Pattern

Colorful lines crisscross these square cookies for a bold, playful look. Don’t worry about precision—imperfections just add personality!

Classic Checkerboard Black and White

Closeup view of several square black and white checkerboard patterned sugar cookies arranged on a plain surface.

Who says square cookies can’t be dramatic? This black-and-white checkerboard design makes a statement with minimal effort.

Color-Blocked Design

A plate of square cookies decorated with colorful icing in striped patterns, featuring combinations of blue, pink, orange, yellow, and green stripes.

Go for eye-catching and easy with bold color block patterns. Just two shades per cookie, and you’re done in no time!

Ornate Swirls

A plate of square cookies with intricate white icing designs on pink and white backgrounds, featuring a butterfly motif.

Delicate, old world-inspired swirls give these square cookies a soft, elegant finish. Great for baby showers or just a cozy tea party!

Love Letter Design

Plate with sugar cookies decorated as envelopes with red heart stamps.

Send sweet messages with these envelope cookies sealed with red hearts. Simple lines and bold accents make them perfect for Valentine’s Day!

Cute Frankenstein

Plate of square cookies decorated with Frankenstein monster faces, featuring green icing, big eyes, and stitched smiles.

How fun are these little Franken-faces? A simple shape becomes spooktacular with green icing and candy eyes.

Pastel Balloons

A plate with rectangular cookies, each decorated with white icing and a colorful balloon design. The balloons are pastel colors including pink, yellow, green, and blue, and each is placed at the center of a cookie.

Bright balloons on a white background make these cookies feel ready for a party. Choose any color combo to match your celebration theme!

Spring Meadow

A plate of square sugar cookies decorated with pastel icing depicting scenic landscapes, featuring grass, colorful flowers, and clouds against varied sky backgrounds.

Lend a springtime feel to your dessert table with these blooming meadow cookies! The soft pastel skies, fluffy clouds, and dainty flowers feel like a sweet stroll through nature.

Thick Rainbow Stripes

Close-up of several square sugar cookies decorated with bright rainbow stripes on a clean background.

Thick rainbow stripes keep things cheerful and neat. All you need is a steady hand and bright icing colors to make this sweet statement.

Gold Drip on White Icing

Closeup of several square sugar cookies with white icing and gold edges arranged on a plain background.

Dressed to impress, these cookies feature golden drip over a clean white base. This design amps up the elegance of simple square cookies!

Zebra Print

Close-up view of several square sugar cookies decorated with black and white zebra stripe patterns on a plain background.

Bring out your wild side with these bold zebra-striped squares. Black and white never looked so cool—or so easy to recreate!

Pinwheel Pattern

Full of motion and color, these pinwheel cookies practically spin with cheer. Just alternate icing wedges for a fun and festive look.

Quilt-Inspired Patchwork Design

Closeup of several square sugar cookies decorated with colorful patchwork patterns arranged neatly on a plain background.

Looking cozy and colorful, these quilt-style cookies are pure charm. Add tiny white dots for that stitched-up finish.

Tiny Crown Designs

Closeup of several square sugar cookies decorated with small crown designs and gold accents on a plain background.

Fit for a party queen, these cookies wear piped crowns with edible pearls. Go pink or white depending on your theme—both feel magical.

Stained Glass Windows

Close-up view of several square sugar cookies decorated with colorful stained glass window patterns, arranged neatly on a plain background.

Inspired by cathedrals these cookies mimic rainbow stained glass windows. Piped black outlines add drama and definition to each colorful pane.

Marble Effect

Close-up of several square sugar cookies with marble swirled icing on a plain background.

Swirl soft pastel icing colors together to create a marble effect that’s as relaxing to look at as it is fun to make. Just swirl and let dry!

Snowflake Patterns

Cool blue and crisp white icing make these snowflake cookies winter-ready. They’re great for holiday cookie exchanges or cozy snowy-day decorating.

Tile-Inspired Look

Close-up view of several square sugar cookies decorated with elegant quatrefoil patterns on a plain background.

Clean lines and soft colors give these cookies a modern, tile-inspired finish. They’re simple, chic, and surprisingly easy to pull off.

Simple Smiley Faces for Kids

Closeup of several square sugar cookies decorated with simple smiley faces on a clean background.

Go ahead—try not to grin when you recreate this design! It’s a bold, cheerful smiley face design that’s an instant mood booster.

Thin Swirling Vines

Closeup of several square sugar cookies decorated with delicate hand-painted vine swirl patterns on a clean background.

Subtle yet sweet, these swirling vine cookies add a delicate touch. They’re great for garden parties, weddings, or minimalist bakes.

Cute Bear Faces

Close-up view of several square sugar cookies decorated with bear faces using colorful icing on a plain background.

How cute are these little bears? Use icing to create adorable little bears on square cookies, and enjoy serving these up at a party!

Detailed Leaves

Close-up of several square sugar cookies decorated with detailed leaf vein patterns on smooth icing, arranged neatly on a plain background.

Elegant and earthy, these cookies with leaf designs bring the outdoors in. Use a piping bag to trace delicate leaf veins for a crisp, modern finish.

Tiny Hearts

Close-up view of several square sugar cookies decorated with small clustered heart shapes on a clean surface.

These cookies are all about charm, with tiny pastel hearts on pink icing. You’ll love giving these treats to your sweetheart on Valentine’s Day or whenever they need a little extra love.

Glittery Rainbow Stripes

Closeup of several square sugar cookies with pastel rainbow layers and glitter on a clean background.

Covered in soft pastel bands and a dusting of glitter, these cookies absolutely shine. Try them for pride parties or springtime birthdays!

Peacock Design

Closeup of several square sugar cookies decorated with colorful peacock feather designs arranged on a plain surface.

Elegant peacock feathers pop against deep blue backgrounds. A touch of gold adds the perfect amount of glam.

Neon Squares and Colored Sugar

Close-up view of several square sugar cookies decorated with bright neon colors and detailed icing designs on a clean background.

These bright cookies pop with neon icing, square borders, and colored sugar at the center of each one. Play with color combos and let the sparkle do the talking!