Step 1

Mix the wet ingredients (butter through eggs) together.

Step 2

In a separate bowl, mix the dry ingredients (flour through baking soda, skipping the masa).

Step 3

Divide the dry ingredients equally into two bowls, and add the yellow masa to one and the blue to the other, mixing until incorporated.

Step 4

Add half of the wet mixture to each bowl, mixing until no lumps remain.

Step 5

Set your Ooni to the lowest setting and preheat for 30 minutes with a 12 inch cast iron skillet inside. If you're using an oven, preheat with the pan inside at 425 degrees.

Step 6

After 30 minutes, remove the skillet and add a tablespoon of butter, swirling to coat the surface.

Step 7

Pour 1/4 of the total quantity of the yellow batter into the skillet, then 1/4 of the blue, repeating with alternating colors until the batter is done. Drag a chopstick or toothpick in straight lines from the top to the bottom of the skillet, working from left to right, to create a marbled effect.

Step 8

Ooni instructions: Bake for 15-20 minutes, rotating the pan 180 degrees after 10 minutes to avoid browning more on one side.

Step 9

Oven instructions: Bake for 20-25 minutes.

Step 10

Check for doneness by moving the pan — if the dough stops jiggling, it is done. Allow to cool for at least 5 minutes before slicing into wedges or squares.