01 -
Get your oven hot at 350°F (175°C) and grab a 9x13-inch metal pan. Line it with foil and spray it well with cooking spray so nothing sticks.
02 -
Grab a stand mixer or hand mixer and mix your butter with brown sugar until you've got a crumbly texture.
03 -
Toss in your eggs and vanilla, then keep mixing until everything looks nice and smooth.
04 -
Sprinkle in the salt and baking powder, then slowly add flour while mixing until you can't see any dry spots.
05 -
Carefully stir in those colorful M&Ms and fun sprinkles until they're spread out nicely in your dough.
06 -
Push the mixture across your pan in an even layer. If it's too sticky, spray some cooking oil on your hands to make it easier.
07 -
Scatter some more M&Ms and sprinkles on top to make it look pretty.
08 -
Pop it in the oven for 22 to 25 minutes until the edges turn golden brown. Don't overbake them if you want chewy bars when they cool down.
09 -
Let everything cool completely before you cut into squares. Keep them in a sealed container or freeze them if you want them to last longer.