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Blog / Tutorial

Filled Cookie Kit: Custom Filled Cookies with AI

Jul 30, 2026 · 8 min read

Filled cookies are the trend taking over social media and the windows of the most modern bakeries. A crunchy cookie on the outside, with a creamy and surprising heart inside — and best of all: in any shape you want.

With the KingsCutter Filled Cookie Kit, you can design your own custom filled cookies in seconds. Forget boring round cutters. Now you can create filled cookies shaped like stars, hearts, unicorns, or your company logo.

What is a Filled Cookie Kit?

The Filled Cookie Kit is an exclusive KingsCutter product with two complementary pieces designed to work together:

  • An outer cutter — defines the cookie shape and contains the filling
  • An inner stamp/press — creates the perfect cavity for filling and can stamp a decorative design on the surface

The result is a cookie with defined edges, an inner cavity for filling (dulce de leche, Nutella, jam, chocolate cream, caramel, cheesecake) and a stamped design on the top.

Why are filled cookies revolutionizing baking?

Filled cookies aren't new, but what's changing is customization. Until now, you had two options: generic round cookies or paying a 3D designer for a custom mold.

With KingsCutter, the process is simple:

  1. Upload your image — logo, drawing, text or photo. AI detects edges and generates the silhouette
  2. Choose Filled Cookie Kit — among 16 product types, select this option
  3. Adjust the design — the system auto-generates the outer cutter and inner seal
  4. Download the STL — first download free, no credit card needed
  5. Print or order — if you have a 3D printer, use food-grade PETG. If not, order from one of our printing partners

Ideas for your custom filled cookies

  • Valentine's Day: hearts filled with chocolate and strawberry
  • Christmas: stars and trees filled with chestnut cream
  • Kids' birthdays: dinosaurs and unicorns filled with Nutella
  • Company logo: corporate cookies with logo filled with dulce de leche
  • Weddings: couple's initials filled with raspberry and white chocolate
  • Halloween: pumpkins and ghosts filled with chocolate cream

Beyond the Filled Cookie Kit

KingsCutter is more than just filled cookies. Our platform offers 16 product types for you to customize:

  • Cutter — classic cookie cutter
  • Stamp — decorative stamp
  • Cutter Stamp — cutter with integrated stamp
  • Cake Topper — cake topper
  • Stencil — stencil for icing
  • Silicone Mold — mold for chocolate, soap or resin
  • Sandwich Cutter — sandwich cutter
  • Modular Cutter — multi-part for complex designs
  • Texture Roller — texture roller
  • Imprint Cutter — embosser for dough and fondant

And if you prefer to buy the physical product instead of printing it, visit store.kingscutter.com where you'll find over 11,000 cutters in food-grade PETG, ready to ship throughout Brazil.

Ready to create your first filled cookie?

Upload your image to kingscutter.com, choose the Filled Cookie Kit and download your free STL. In minutes you'll have the perfect mold to surprise everyone with custom filled cookies.

Your first download is completely free. No premium registration, no commitment.

How much filling goes into a filled cookie, and how do you seal it?

Filling should take up to 70% of the cavity depth: if you fill it flush, the filling overflows when you press the top on, wets the sealed dough ring and the cookie opens while baking. Place a portion the size of a small teaspoon in the centre, leave the dough ring at the edge free, and press the top down with your fingers until the 2 layers join. The tall-walled outer cutter acts as your guide: its inner edge marks exactly where that sealed ring should sit.

2 details change the result. First, roll the base slightly thinner than the top. Second, the filling must be cold or at room temperature: a hot or very runny filling dampens the dough and the seal lifts in the oven.

Data and measurements

ItemValueSource
MaterialFood-grade PETG, safe for food contact (not PLA)Product specification at kingscutter.com
Available sizes7, 8, 9, 10, 13, 15, 17 and 20 cmkingscutter.com catalogue
Handle (puxador)Included with the physical cutter; not sold as a separate accessoryProduct information at kingscutter.com
WashingHand wash recommended; a dishwasher degrades PETGCare guidance at kingscutter.com
Materials it works withFondant, cookie dough, polymer clay, foam and salt doughUsage notes at kingscutter.com
Suggested dough thickness2 discs of about 5 mm (base and top) for a 10 cm cookieOur own measurement in the workshop
Design scalingThe same drawing at 7 cm and at 20 cm keeps the silhouette and inner stamp in proportionOur own measurement in the workshop

Based on our own measurement in the workshop, a 10 cm filled cookie needs 2 discs of dough about 5 mm thick, one for the base and one for the top. With that pair of discs the 10 cm cutter travels cleanly and the inner stamp leaves the cavity at exactly the right depth for the top to close without cracking.

En la práctica

Based on our own measurement in the workshop, the system scales the whole outline when you change size: the same drawing cut at 7 cm and at 20 cm keeps the silhouette and the inner stamp in proportion, so you never have to redesign when the batch size changes.

From image to STL to baking tray

The workflow is short: upload your image, choose the product type and download a file ready for 3D printing. If you do not own a printer, you can order the physical piece with shipping to several countries. To understand why PETG is the right filament for food contact, read our comparison of PLA vs PETG in cookie cutters, and if you want to start from your own photo, see how to turn a photo into a 3D cutter.

With a Filled Cookie Kit, every filled cookie can carry your shape, your logo or your child's drawing, with a defined edge and an embossed top. The kingscutter.com library holds hundreds of designs and the first download is free: go to design at kingscutter.com, choose Filled Cookie Kit and try the kit with your own drawing. If you would rather receive the printed piece, the physical store ships to several countries.

Sources and standards

The technical data in this guide is backed by verifiable official sources:

  • ANVISA — food regulation in Brazil
  • FDA — food contact material safety

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Preguntas frecuentes

How much filling goes into a filled cookie?

Filling should take up to 70% of the depth of the cavity the inner stamp creates. If you fill it flush, the filling overflows when you press the top on, wets the sealed dough ring and the cookie opens in the oven. A portion the size of a small teaspoon in the centre is enough for a 10 cm cookie.

Can I use Nutella, dulce de leche or jam with the Filled Cookie Kit?

Yes, the kit works with classic fillings such as dulce de leche, chocolate cream, jam, caramel and cheesecake cream. The only condition is that the filling is cold or at room temperature: a hot or very runny filling dampens the dough and the seal lifts during baking.

Can the Filled Cookie Kit also make cookies without filling?

Yes. The outer cutter works like any cookie cutter, and the inner stamp can be used on its own to emboss the design on the surface without creating a cavity. That gives you two products from one file: filled cookies and embossed cookies.

What material are the pieces made of and how do I clean them?

The physical pieces are made of food-grade PETG, safe for food contact (they are not PLA). Hand washing with warm water and mild soap is recommended, because a dishwasher degrades PETG over time. Every physical cutter includes the handle (puxador); it is not a separate accessory.

Do I need a 3D printer to use the Filled Cookie Kit?

No. On kingscutter.com you upload your image, choose the product type and download the print-ready STL, with the first download free and no credit card. If you do not own a printer, you can order the physical print at store.kingscutter.com with shipping to several countries.

Updated: Sep 15, 2026 · By KingsCutter

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