Instructions for Cookie Bars:

Preheat the oven to 350°F. Line a 9x13” metal pan with foil and generously coat it with cooking spray.

Using a stand or hand mixer, blend butter and brown sugar until crumbly. Incorporate eggs and vanilla until smooth. Add salt, baking powder, then flour. Gently mix in M&Ms and sprinkles.

Transfer the mixture to the prepared pan. Since the dough is moist, spray your hands with cooking spray to smooth it evenly. Sprinkle the remaining mix-ins on top.

Bake for approximately 22-25 minutes until they begin to turn golden. It's advisable to slightly under-bake them, as they will continue to set as they cool. Slice into bars.

Store in an airtight container for up to 4 days or freeze for a month.

Notes:

Ensure accurate measurement of flour and sugar.

Store in an airtight container for a week, suitable for shipping.

"Jimmies" refer to long rod-type sprinkles, not the small round balls.

Some may find these bars appearing "raw" after cooking.

They will achieve a golden brown color around the edges and on top, lose glossiness, and have a slightly underdone center when removed from the oven. This intentional fudgy appearance ensures a rich and soft texture. The bars should not remain liquid in the center after cooling, resembling the images.

Consider the type of pan used; a metal 9x13-inch pan is recommended for even heat distribution. Avoid using a glass pan, as it may lead to uneven baking.

Customize with any color M&Ms and sprinkles for different holidays.