Baking a treat that feels like a celebration has never been easier with these Giant Single-Serving Birthday Cake Oreo Cookies. Each cookie is a soft, chewy masterpiece, bursting with colorful sprinkles and a rich, creamy Oreo filling. The combination of vanilla cake flavor and chocolatey crunch creates a delightful contrast that’s impossible to resist. Perfect for satisfying a sweet tooth or impressing a friend, these cookies come together in just 25 minutes, making them ideal for spontaneous indulgence.
With a prep time of only 10 minutes, you’ll love how quickly these cookies come to life. The golden edges and gooey center offer a texture that’s both comforting and exciting. Every bite is a nostalgic trip to birthday parties, wrapped in a warm, freshly baked cookie. Whether you’re treating yourself or sharing the joy, these cookies are a guaranteed mood booster. Ready to bake? Let’s make dessert dreams come true!
Ingredients for GIANT Single-Serving Birthday Cake Oreo Cookies

- 1 cup (5 oz / 150g) all-purpose flour
- ½ teaspoon baking soda
- ⅛ teaspoon baking powder
- ⅛ teaspoon salt
- ¾ cup (6 oz / 170g) sugar
- 5 tablespoons (73g / 2 ⅝ oz) cold butter (cut into small cubes)
- 3 tablespoons large egg (lightly beaten; substitute with flax egg for vegan option)
- 1 teaspoon vanilla extract
- Buttercream frosting (store-bought or homemade, as needed)
- 3 tablespoons sprinkles (for mixing into frosting)
Step-by-Step Instructions
- Preheat your oven to 350°F (180°C) and line a baking sheet with parchment paper.
- In a bowl, thoroughly mix the flour, baking soda, baking powder, salt, and sugar until combined.
- Add the cold butter and use a fork (or your fingers) to rub it into the dry mixture until it resembles fine breadcrumbs. (Alternatively, use a food processor for this step.)
- Add the egg and continue mixing until the dough comes together. Use your fingers to bring it into a cohesive mass.
- Evenly divide the dough into two halves and place them on the prepared baking sheet, spacing them about 5 inches apart (they will spread while baking). Slightly flatten each dough portion to about 3 inches wide.
- Bake for 15-17 minutes or until the edges are lightly golden. Transfer the baking sheet to a rack to cool completely.
- While the cookies cool, prepare the buttercream frosting by mixing in the sprinkles.
- Once cooled, sandwich the cookies together with the sprinkle-filled buttercream frosting.
- Enjoy your cookies immediately or store them in an airtight container for up to 2 days.
Fun Frosting & Topping Ideas
While buttercream frosting with sprinkles is a classic choice, feel free to get creative! Try using cream cheese frosting for a tangy twist or chocolate ganache for a rich, decadent option. For extra crunch, add crushed Oreos or rainbow sprinkles between the layers. You can even drizzle melted white or dark chocolate on top for a fancy finish!
Perfect Pairings for Your Giant Cookie
These giant cookies are a treat on their own, but they’re even better with a cold glass of milk or a scoop of vanilla ice cream. For a birthday-themed dessert, serve alongside a slice of cake or a handful of colorful candies. They’re also great with a cup of coffee or hot cocoa for a cozy snack.
Storage Tips for Freshness
To keep your cookies soft and delicious, store them in an airtight container at room temperature for up to 2 days. If you want to enjoy them later, wrap each cookie tightly in plastic wrap and freeze for up to 1 month. Thaw at room temperature before serving, or warm them in the microwave for 10-15 seconds for a freshly baked feel.
Quick Time-Saving Hacks
Short on time? Use a food processor to mix the dough quickly and evenly. You can also prepare the dough ahead of time, shape it into discs, and refrigerate for up to 24 hours before baking. If you’re in a rush, skip the frosting and enjoy the cookies plain—they’re still delicious!
Common Questions Answered
Wondering if you can use margarine instead of butter? Yes, but the flavor and texture may differ slightly. For a vegan version, try using a plant-based butter and a flax egg. If your cookies spread too much, make sure your butter is cold and your baking sheet isn’t too warm when you place the dough on it.

GIANT Single-Serving Birthday Cake Oreo Cookies
Ingredients
- 1 Cup all-purpose flour 5oz /150g
- ½ teaspoon baking soda
- ⅛ teaspoon baking powder
- ⅛ teaspoon salt
- ¾ cups sugar 6 oz /170g
- 5 Tablespoons cold butter 73g /2 ⅝ oz
- 3 Tablespoons large egg
- 1 teaspoon vanilla extract
Buttercream Frosting recipe
- 3 Tablespoons sprinkles
Instructions
- In a bowl, thoroughly mix the flour, baking soda and powder, salt, and sugar.
- Add the butter and with a fork (or your fingers) rub it in until it resembles fine breadcrumbs. (you can also do this step in a food processor)
- Add the egg and continue mixing until dough comes together in a mass. You will have to use your fingers to bring it together
- Evenly divide the dough in half and place on a parchment paper-lined baking sheet. Place approximately 5 inches apart, the cookies will spread while baking. Slightly flatten the dough to 3inch wide.
- Bake for 15-17 minutes AT 350oF (180oC). Set baking sheets on a rack to cool.
- Once cooled sandwich your cookies together with buttercream frosting mixed with sprinkles
- Enjoy your cookies immediately. Store in an airtight container for up to 2 days