Texas Sheet Cake Cookies – transform the classic Texas sheet cake into thick, fudgy cookies topped with a smooth, tangy chocolate icing. Easy to make and decadently chocolatey.
When I was growing up, we had sheet cake a few times a year and it was always a crowd-pleaser. It was a go-to for birthdays or large gatherings, and the frosting is what set it apart from an ordinary cake.
That slightly tangy note in the frosting comes from sour milk historically, and nowadays often from a little vinegar. This tang is what gives the frosting its distinctive flavor.
I’ve seen these cookies around online for a few years and finally developed a version that uses the tangy icing I remember from the sheet cake of my childhood. The cookies are thick and fudgy, and the icing brings the familiar flavor that makes sheet cake so memorable.
What You’ll Need
- Unsalted butter
- Granulated sugar
- Large egg
- Vanilla extract
- Cocoa powder
- Cinnamon (optional — commonly used in Texas sheet cake)
- Baking powder
- Salt
- All-purpose flour
- Semi-sweet chocolate (melted)
The melted icing is simple and is the finishing touch that recreates the sheet cake flavor.
- Butter
- Cocoa powder
- Milk
- White vinegar
- Powdered sugar
- Vanilla extract
How To Make Texas Sheet Cake Cookies
Scroll to the recipe card below for the full printable ingredient amounts and instructions.
- Cream together the butter and sugar in a mixer until light and fluffy.
- Add the egg and vanilla, beating until fully incorporated.
- Stir in cocoa powder, baking powder, salt, (and cinnamon if using) and the flour until combined. Add the melted semi-sweet chocolate and mix until uniform.
- Form the dough into 18 even balls and place them on a lined baking sheet.
- Bake at 350°F for 8 minutes, until the tops look just dry. Do not overbake — the centers should remain fudgy.
- Remove from the oven and allow the cookies to cool completely on the baking tray.
- Prepare the icing: melt the butter in a saucepan over medium heat. Whisk in the cocoa, milk, vinegar, vanilla, and powdered sugar until smooth and pourable. If it’s too thick, add milk 1 teaspoon at a time until it reaches the right consistency.
- Pour the icing over the cooled cookies while they are still on the baking tray. Let them sit at room temperature for about an hour (or longer) until the icing sets.
Recipe Tips
- Do not overbake — for fudgy cookies remove them when the tops appear just dry. With 18 evenly sized dough balls, 8 minutes at 350°F is typically perfect.
- No chilling required — the dough can go straight to the oven after mixing.
- The dough won’t spread much while baking. Shape the cookies to the thickness you want before baking if you prefer thinner cookies.
- Cinnamon is optional. Many Texas sheet cake recipes include a hint of cinnamon; it adds warmth but isn’t mandatory.
- Don’t skip the vinegar in the icing — that small amount of acid gives the classic sheet cake tang. Traditionally this flavor came from sour milk or milk mixed with vinegar.
Cookie Storage
Store cookies in an airtight container at room temperature for up to 3 days. They are best enjoyed at room temperature rather than chilled.
If freezing, freeze the uniced cookies for best results. Frosted cookies can develop an odd texture when thawed, so icing after thawing is preferable.
Chocolate lovers will adore these — they’re rich, fudgy, and finished with a tangy, chocolatey icing that evokes the classic Texas sheet cake flavor.
More Cookies Recipes
- M&M Cookies
- Andes Mint Cookies
- Chick-Fil-A Cookies
- Cherry Chocolate Chip Cookies
- Pumpkin Sugar Cookies
- Chewy Molasses Cookies
- Chocolate Peppermint Cookies
- Frosted Sugar Cookies
Texas Sheet Cake Cookies
Ingredients
Cookies
- 1/2 cup unsalted butter, softened
- 1/2 cup granulated sugar
- 1 large egg
- 1 teaspoon vanilla extract
- 3 tablespoons cocoa powder
- 1 teaspoon baking powder
- 1/2 teaspoon salt
- 1/2 teaspoon cinnamon (optional)
- 1 1/3 cup all-purpose flour
- 1/2 cup semi-sweet chocolate, melted
Icing
- 1/2 cup butter
- 2 tablespoons cocoa powder
- 3 tablespoons milk (plus more if needed)
- 1 teaspoon white vinegar
- 2 1/2 cups powdered sugar
- 1 teaspoon vanilla extract
Instructions
- Preheat oven to 350ºF.
- Cream butter and sugar until smooth. Add the egg and vanilla and beat until combined.
- Mix in cocoa, baking powder, salt, cinnamon (if using), and flour until a batter forms. Stir in the melted chocolate.
- Scoop into 18 balls and place on a lined baking sheet. Bake 8 minutes, until tops are just dry.
- Remove and let cookies cool completely on the baking sheet.
- For the icing, melt the butter in a saucepan and whisk in cocoa, milk, vinegar, vanilla, and powdered sugar until smooth and pourable. Add milk a teaspoon at a time if needed.
- Pour the icing over cooled cookies and let sit until the icing is fully set, about 1–2 hours.
- Store in an airtight container for up to 3 days at room temperature.
Nutrition
Nutrition information is an approximation.
Additional Info
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