Preheat your baking vessel and oven, following your bread recipe instructions.
In a medium mixing bowl, mix together 100 g all-purpose flour, 60 g water, and 2 g fine sea salt until shaggy. Knead together until dough is smooth. Add 5-10 g more water at a time to get the consistency you like.
Split the dough into as many colors you want. Keep doughs lightly covered with plastic wrap to avoid them from drying out.
Knead in gel food coloring to each dough ball.
Create your design:
Transfer your sourdough to parchment paper.
Begin adding your 3D sourdough art design, using water as glue. Make sure to not make the designs too thick, or else they'll take longer to bake + weigh on the sourdough loaf in the oven.
Bake
Bake your sourdough according to your recipe.Note: Keep in mind that if you remove the lid towards the end of your baking, the colors may fade and brown. I've actually baked my sourdoughs with the lid on the entire time and still got nice bakes with bubbly, crusty exteriors!If you bake on a baking steel/stone, I highly recommend covering the 3D art with aluminum foil the entire time.
Enjoy!
Notes
Nutrition facts are based off of 1 sourdough loaf (100 g sourdough starter, 375 g water, 500 g bread flour, 12 g salt) and 3D art ingredients.