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Soft Baked Birthday Cake Sandwich Cookies Recipe with Fluffy Sprinkle Filling Made Easy

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These soft baked birthday cake sandwich cookies feature a moist, tender cookie paired with a light, fluffy sprinkle buttercream filling. Perfect for celebrations or any day you want a joyful treat.

Ingredients

Scale
  • 2 ½ cups (310g) all-purpose flour, sifted
  • 1 teaspoon baking powder
  • ½ teaspoon baking soda
  • ¼ teaspoon salt
  • 1 cup (227g) unsalted butter, softened
  • 1 cup (200g) granulated sugar
  • ½ cup (100g) packed brown sugar
  • 2 large eggs, room temperature
  • 2 teaspoons pure vanilla extract
  • 2 tablespoons (30ml) milk
  • ¾ cup (130g) rainbow sprinkles
  • ½ cup (113g) unsalted butter, softened (for filling)
  • 2 cups (240g) powdered sugar, sifted (for filling)
  • 2–3 tablespoons (30-45ml) heavy cream (for filling)
  • 1 teaspoon pure vanilla extract (for filling)
  • ⅓ cup (55g) rainbow sprinkles (optional, for filling)

Instructions

  1. Preheat oven to 350°F (175°C) and line two baking sheets with parchment paper or silicone mats.
  2. In a medium bowl, whisk together sifted flour, baking powder, baking soda, and salt. Set aside.
  3. In a large bowl, cream 1 cup softened unsalted butter with granulated sugar and brown sugar using an electric mixer until light and fluffy, about 3 minutes.
  4. Beat in eggs one at a time, then mix in 2 teaspoons vanilla extract until creamy and smooth.
  5. Gradually add dry ingredients alternately with milk, starting and ending with flour mixture. Mix until just combined.
  6. Gently fold in ¾ cup rainbow sprinkles with a spatula, being careful not to overmix.
  7. Scoop dough onto baking sheets about 2 inches apart using a cookie scoop or tablespoon. Wet hands slightly to shape if needed.
  8. Bake for 10-12 minutes until edges are set but centers remain soft. Remove from oven and cool completely on racks.
  9. To make filling, beat ½ cup softened unsalted butter on medium speed until creamy. Gradually add powdered sugar alternating with heavy cream. Beat until light and fluffy, about 3-5 minutes.
  10. Stir in 1 teaspoon vanilla extract and fold in ⅓ cup rainbow sprinkles if desired.
  11. Assemble cookies by spreading or piping about 1 tablespoon of filling onto the flat side of one cookie, then sandwich with another. Press gently to spread filling evenly.
  12. Chill assembled cookies for 20 minutes if desired for easier handling, or serve at room temperature.

Notes

Use room temperature ingredients for best texture. Do not overmix dough to avoid tough cookies. Slightly underbake cookies for soft centers that firm up while cooling. Fold sprinkles gently to prevent color bleeding. Chill assembled cookies for easier handling and to prevent filling melting. Store in airtight container at room temperature up to 3 days or refrigerate for longer freshness. Freeze assembled cookies up to 2 months.

Nutrition

Keywords: birthday cake cookies, sandwich cookies, sprinkle filling, soft baked cookies, buttercream filling, easy cookie recipe, celebration cookies

Find it online: https://ovenmila.com/soft-baked-birthday-cake-sandwich-cookies-recipe-with-fluffy-sprinkle-filling-made-easy/