Spray a 13-by-18-inch rimmed baking sheet with cooking spray. Whisk together the flour and baking powder in a medium bowl.

2 1/2 c. For the cake: Preheat the oven to 350˚F. Spray a 13-by-18-inch rimmed baking sheet with cooking spray. Whisk together the flour and baking powder in a medium bowl. Combine the sugar and ...

When Todd’s 7th birthday cake was recorded for Food Network's Pioneer Woman, the family all pitched in to decorate the sheet cake with M&M'S, gummy worms and some farm animal-shaped figurines.