Soft and chewy Funfetti Sandwich Cookies are the perfect celebratory treat! These Funfetti Cookie Sandwiches are cake batter flavored sugar cookies full of sprinkles, sandwiched with silky cake batter buttercream. The edges can then be rolled in more sprinkles for flavor and fun! They are easy to make, delicious to eat, and fun for all ages. Make it with me!

Funfetti Sandwich Cookies

I wanted the flavor of these funfetti cookies to lock in with the flavor of funfetti, which is cake batter. The best way to do that? Extracts! I added vanilla and almond extract to best replicate that classic cake batter flavor.

I also added extra sprinkles so these cookies would bake up bright and colorful and fun!

Now, you don’t have to sandwich the cookies together if you don’t want to. These cookies have tons of flavor on their own and make cute treats as simple drop sugar cookies.

However, the best part is arguably the cake batter flavored buttercream. I used a funfetti cake mix to flavor this buttercream, which is spot on with the funfetti flavor!

All in all, you’re in for a treat with this one!

A Celebratory Sandwich Cookie

These funfetti sandwich cookies are the perfect celebratory treat! They would make the perfect birthday cookie, party favor, or cookie cake. They scream birthday treat!

But, the whimsical rainbow colors also play into other holidays, like St Patrick’s Day! I think these make the perfect St Patrick’s Day Cookie Recipe.

What You’ll Need To Make Birthday Cake Cookies

Ingredients

• 1/2 cup butter, room temperature
• 3/4 cup granulated sugar
• 1 large egg
• 1 teaspoon vanilla extract
• 1/2 teaspoon almond extract
• 11/2 cups all-purpose flour
• 1/2 teaspoon baking powder
• 1/2 teaspoon baking soda
• 2 teaspoons cornstarch
• 1/2 teaspoon salt
• 1/2 cup rainbow sprinkles – (or colors of your choice)

For The Homemade Cake Batter Buttercream

• 1/2 cup butter, softened
• 2 cups powdered sugar
• 1/2 cup boxed funfetti dry cake batter* (pretreat the cake mix by spreading it out on a baking sheet and baking it at 350 for 5 minutes. This is easy to do as you’re making the cookies so you don’t consume raw flour)
• 1 Tablespoon cream cheese
• 1-2 Tablespoons whole milk

How To Make Rainbow Sandwich Cookies

1. Preheat oven to 350.
2. In a mixing bowl or stand mixer, beat the butter and sugar until light and fluffy. Add the egg, vanilla, and almond extract, and beat until smooth.
3. Next, add flour, baking powder, baking soda, corn starch, and salt, and mix slowly until the dough begins to come together.
4. Add the rainbow sprinkles and stir again until just combined.
5. Portion and roll the dough onto a prepared baking sheet. Bake for 10-11 minutes, until the edges and bottoms are golden but the center is slightly soft. Allow the cookies to cool completely.
6. Prepare the cake batter buttercream by beating together all the ingredients until light, fluffy, and smooth.
7. Apply the desired amount of frosting to the bottom of one cookie using a small offset icing knife and spoon, a small cookie dough scoop, or a piping bag with a piping tip of choice.
8. Apply the bottom of another cookie to the frosted side of the first cookie. Gently press together. If desired, press the sides into additional rainbow sprinkles. Enjoy!

Like this recipe? Pin it to Pinterest here!