Confetti Frosted Sugar Cookie Squares
Confetti Frosted Sugar Cookie Squares
Sweeten up your day with this fast and easy dessert recipe by Anna Olson from Bake with Anna Olson.
  • Difficulty Level Easy
  • Technique Baking
  • Preparation Time 20 minutes
  • Cooking Time 20 minutes
  • Yield 36 to 48 servings
  • Cookie:
  • ½ cup unsalted butter, at room temperature
  • ¾ cup granulated sugar
  • 1 large egg, at room temperature
  • 2 ¼ cup all-purpose flour
  • 1 teaspoon cream of tartar
  • ½ teaspoon baking powder
  • ½ teaspoon salt
  • ½ cup coloured sprinkles
  • Frosting:
  • ½ cup unsalted butter, at room temperature
  • 3 ¼ cups icing sugar, sifted
  • ¼ cup half-&-half cream
  • 1 ½ teaspoon vanilla extract
  • Coloured sprinkles, for décor
  1. Preheat the oven to 350 °F (180 °C). Lightly grease a 9-x-13-inch (23 x 33 cm) pan and line it with parchment so that the paper comes up the sides.
  2. Cream the butter and sugar by hand in a large mixing bowl, until fluffy. Beat in the egg. In a separate bowl, sift the flour, cream of tartar, baking powder and salt. Add this all at once to the butter mixture and stir until the mixture is an even but rough crumbly texture (it will not come together as a dough). Stir in the sprinkles. Press this into the prepared pan and bake for about 20 minutes, until it just begins to brown at the edges. Cool the cookie in the pan on a rack completely before frosting.
  3. For the frosting, use electric beaters or a stand mixer fitted with the paddle attachment to beat the butter until smooth. Add about half of the icing sugar and beat in first on low speed, and then increase to medium-high and beat until fluffy and scarping down the sides of the bowl once or twice. Add the cream and vanilla and beat in until smooth. Add the remaining icing sugar and beat again on low and then increasing to medium-high, until the frosting is fluffy. Spread this over the cookie base and top with sprinkles. Let the pan sit uncovered for an hour and then cut the cookies into squares.
  4. The cookies can be stored in an airtight container for up to a week.

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