Turkish Mushroom Cookies (Cornstarch Shortbread)

Name: Turkish Mushroom Cookies
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Cuisine: Turkish
Ingredients: 100 g unsalted butter, room temperature, very soft; 1 egg, room temperature; 150 g granulated sugar, equivalent to 3/4 cup; 120 g cornstarch, equivalent to 1 cup; 180 g all-purpose flour, equivalent to 1.5 cups, add gradually; 4 g baking powder, equivalent to 1 teaspoon; 5 ml vanilla extract, equivalent to 1 teaspoon or 1 packet vanilla sugar; 2 g unsweetened cocoa powder, equivalent to 1 teaspoon, for dipping

What You Need

Ingredients

16 cookies

Dough3 1/2 oz unsalted butterroom temperature, very soft
1 eggroom temperature
5 1/4 oz granulated sugarequivalent to 3/4 cup
4 1/4 oz cornstarchequivalent to 1 cup
6 1/3 oz all-purpose flourequivalent to 1.5 cups, add gradually
4 g baking powderequivalent to 1 teaspoon
1 tsp vanilla extractequivalent to 1 teaspoon or 1 packet vanilla sugar
Finish2 g unsweetened cocoa powderequivalent to 1 teaspoon, for dipping

Equipment

Mixing bowl
Baking sheet
Parchment paper
Small bottle cap

FAQ

Frequently Asked Questions

Very soft butter allows the high volume of starch to hydrate evenly without requiring excessive liquid. If the butter is too cold, the dough will be crumbly; if it is melted, the cookies will spread flat during baking.

Flour absorption varies by brand and ambient humidity. Stop adding flour as soon as the dough no longer sticks to your fingers and can be rolled into a smooth ball without cracking. It should feel exactly like soft play-dough.

Cornstarch inhibits gluten formation, creating an exceptionally tender, melt-in-the-mouth texture. It acts as a structural stabilizer that keeps the crumb short and delicate rather than dense or chewy.

Yes, wheat starch and cornstarch can be used interchangeably in this recipe. Both provide the necessary powdery lightness required for the correct texture.

Dip the bottle cap into the cocoa powder before every single stamp. Tap the cap gently on the side of the cocoa bowl to remove excess powder so it doesn't spill over the edges of the imprint.

Yes. You can form the dough into balls and freeze them on a baking sheet before transferring to an airtight container. Thaw them slightly at room temperature before stamping with cocoa and baking.

Resting the cookies in the residual heat gently sets the centers without browning the exteriors. These cookies should remain pale; skipping this step and baking longer at full heat risks burning the delicate starch.

They have a mild, balanced sweetness. The delicate texture is the main focus, making them perfect for pairing with strong coffee or tea rather than serving as an overwhelmingly sugary dessert.

Step By Step

Instructions

Prep
Beat the wet base together
Grab a good-sized mixing bowl and work the extra-soft, room-temperature butter together with the egg and granulated sugar. You want that butter soft enough to give way under the lightest touch - if it's cold, the dough won't come together properly and your cookies might melt outward in the oven. Keep mixing until everything turns wonderfully smooth and noticeably light.
3 1/2 oz unsalted butter1 egg5 1/4 oz granulated sugarMixing bowl
Work in the dry ingredients and knead
Toss in your cornstarch, vanilla extract, and baking powder right on top of that creamy base. Start bringing the dough together with your hands, sprinkling in the all-purpose flour little by little as you go. Don't rush to dump it all in, since factors like kitchen humidity and your specific brand of flour change what you need. Pull back the moment the dough feels soft, supple, and clean against your skin.
4 1/4 oz cornstarch1 tsp vanilla extract4 g baking powder6 1/3 oz all-purpose flour
Roll out and stamp the mushroom caps
Roll portions of the dough into neat little walnut-sized spheres, laying them out with decent spacing across a parchment-lined baking sheet. Take a clean, ordinary bottle cap, dip the open rim into your unsweetened cocoa powder, and give it a firm, steady press straight into the center of each ball. That leaves behind a sharp cocoa ring, squishing the dough down just enough to look like a little woodland mushroom.
2 g unsweetened cocoa powderBaking sheetParchment paperSmall bottle cap
Cook
Bake and let them settle in the oven
Slide the baking sheet into an oven preheated to 180°C (356°F) and set your timer for exactly 12 minutes. You want these cookies to stay pretty and pale, so don't let them take on any dark browning. Once those 12 minutes are up, kill the oven heat completely and resist opening the door. Let the cookies hang out in that residual warmth for an extra 3 minutes so the centers finish setting without scorching the bottoms.
3 1/2 oz unsalted butter1 egg5 1/4 oz granulated sugar4 1/4 oz cornstarch6 1/3 oz all-purpose flour4 g baking powder1 tsp vanilla extract2 g unsweetened cocoa powder

The secret behind these classic Turkish treats is cornstarch, which gives them that dreamy melt-in-your-mouth texture you won't get from standard flour alone. Take your time working the flour in until you get a soft, pliable dough - if it gets too heavy, you'll see tiny cracks form when you shape them.

Here’s the fun part: just press a cocoa-dusted bottle cap right into the center of each dough ball to mimic a little mushroom cap. Be steady with your pressure so they stay nice and plump, and pull them while they're still pale instead of waiting for a deep golden crust. It’s an effortless parlor trick that looks like you bought a specialty mold.