Sheet Pan Halloween Pancakes with Spooky Spider Webs

Preheat your oven to 450°F. Line a half sheet pan with parchment paper and then spray the paper with cooking spray.
In a large bowl, combine the flour, baking powder, baking soda, and salt with a whisk.
In a medium bowl, combine the sugar, oil, vanilla, eggs, Greek yogurt, and milk and whisk until smooth.
Add the wet ingredients into the dry ingredients and whisk together until just combined. A few lumps in the batter are fine, you don't want to over mix.
Remove about ½ cup of the vanilla batter and transfer it to the medium bowl that was used to combine the wet ingredients. Add the cocoa powder and one tablespoon of water and whisk to combine.
Spread the remaining vanilla batter in the prepared sheet pan until it is smooth and even.
Transfer the chocolate batter into a zip bag or piping bag that is supported by a glass or cup.
Snip the corner of the bag off to form a small opening. Pipe bulls-eye shapes over the vanilla batter until you have used up all of the chocolate batter.
Use a toothpick to drag through the batter from the center of each bulls-eye to the edge. Lift the toothpick out of the batter and repeat around the circle until you form a spider web pattern. Repeat with all of the bulls-eye shapes.
Bake the pancakes for 12-15 minutes, until the top is no longer shiny and the edges are golden.
Remove from the oven and use a serrated knife to slice the pancakes into 24 squares.
Serve with butter or maple syrup, as desired.