01 -
Preheat your oven to 350°F (175°C) and prepare a 9x13-inch metal baking pan by lining it with foil and giving it a generous spray of cooking spray.
02 -
With a stand mixer or hand mixer, blend the butter and brown sugar until the mixture appears crumbly.
03 -
Add in the eggs and vanilla extract, mixing until the batter is smooth.
04 -
Gradually incorporate the salt and baking powder, then slowly blend in the flour until fully combined.
05 -
Gently fold in the vibrant M&Ms and festive sprinkles until evenly distributed throughout the dough.
06 -
Spread the mixture evenly in the prepared pan. Use cooking spray on your hands for easier smoothing of the sticky dough.
07 -
Add any extra M&Ms and sprinkles on top for decoration.
08 -
Bake the bars for 22 to 25 minutes until they appear golden on the edges. Remember, slightly underbaking them ensures a deliciously chewy texture as they cool.
09 -
Allow the bars to cool fully before cutting them into squares. Store in an airtight container or freeze for longer preservation.