Preheat oven to 350 degrees F.
Spray a half baking sheet (18"x13"x1") with nonstick cooking spray; set aside.
In a large mixing bowl or stand mixer, beat together eggs and cocoa powder.
Add salt and baking powder and mix until combined.
Mix in vanilla.
Add melted butter and sugar and mix until well combined.
Mix in flour until well combined.
Spread in prepared baking sheet.
Bake for 35-40 minutes, or until an inserted toothpick comes out clean.
Let cool and cut into squares.
Place white chocolate chips in a microwave-safe bowl and microwave for 2 minutes, then stir until smooth.
Pour melted white chocolate into a baggie, cut the tip off one corner of the bag and pipe back and forth over brownies.
Press two candy eyes into the melted chocolate on each brownie.
Let cool until set, then serve.