Preheat the oven to 350 degrees. Use convection bake if you have it.
In a large mixing bowl, combined softened butter and cream cheese. Beat with a hand or stand mixer until smooth. Scrape down the bowl once complete.
Next, add the granulated sugar. Beat on high until smooth.
Add the egg, almond extract, vanilla extract, salt and baking powder. Mix well until combined. Scrape down the bowl once complete.
Add the flour in 2-3 portions, mixing well after each addition.
Add the sprinkles then mix until combined. Scrape down the bowl once complete.
Grease, then line a 9x13 inch pan with parchment paper. If you don't have parchment paper, just use a nonstick spray to completely coat the pan.
Press the dough evenly throughout the pan. Use another piece of parchment paper to press the dough down if desired.
Bake the cookie bars for 35-40 minutes, or until the cookie edges begin to brown. Allow the bars to cool completely before frosting them.