01 -
Cut butter into pieces. Place in a microwave-safe bowl and microwave on high until melted, about 45 seconds. Set aside to cool.
02 -
Place eggs, granulated sugar, and vanilla in a large bowl and whisk vigorously until homogeneous, about 2 minutes.
03 -
Add flour, baking powder, and salt, and whisk to combine. Add the cooled butter and whisk until completely smooth, about 1 minute.
04 -
Cover the bowl and let the batter rest for 30 minutes. Alternatively, store in fridge overnight, bringing to room temperature for 30 minutes before using.
05 -
Preheat pizzelle press. Lightly coat with cooking spray and portion 2 teaspoons of batter into center of each form. Close press and cook until lightly golden-brown, 1 to 1 1/2 minutes.
06 -
Transfer to wire rack with thin spatula. Repeat with remaining batter. Cool completely. Dust with powdered sugar if desired.