The dough is simple to put together but plan ahead since you roll out quarters of the dough, stack them between parchment and chill them for at least 4 hours or overnight before cutting and baking.
Here’s the recipe: In a small bowl blend 3/4 cup buttermilk with 2 tablespoons tahini (be sure and stir it up well first!). In the bowl of a stand mixer with the paddle combine 227 g / 1.75 cups all purpose flour, 50 g / 1/2 cup chickpea flour (I use Bob’s Redmill), 1 tablespoon sugar, 1 teaspoon kosher salt, 1 tablespoon ground cumin, 1/4 teaspoon ground allspice and 113 g / 4 ounces cold unsalted butter cut in 1/4” cubes. Blend on low until butter is in small pieces then add the buttermilk mixture and mix to a wet dough.
The dough is pretty easy to handle when the work surface is properly floured. Divide the dough in 4, keeping the waiting quarters in the fridge as you roll out one at a time. Roll each quarter to a 12”x13” (ish) rectangle - mine was pretty loose-y goose-y since I envisioned my crackers would end up in a variety of shapes and sizes, and I didn’t mind some rough edges. The main thing is rolling the dough nice and thin (1/16”) for better crisping up during the bake.
Line a half sheet pan with parchment, sprinkle with cornmeal (or semolina) and place the first rolled out dough quarter on it. Place a second piece of parchment on the dough, sprinkle again with cornmeal and place the rolled out second quarter on it. Repeat with the other two portions. Cover with plastic and refrigerate 4 hours or overnight. I chose overnight.
When ready to bake, heat the oven to 350ºF. Have a teaspoon of kosher salt and 2 tablespoons sesame seeds on hand. Lift one of the dough portions on its parchment onto an empty sheet pan. Fork prick it all over, brush lightly with water and sprinkle 1/4 teaspoon kosher salt and 1/2 tablespoon sesame seeds over the top. Cut into squares or rectangles (or whatever shape and size you’d like) with a pizza cutter.
Repeat the above with the next batch of dough on a second empty sheet pan. NOTE - I baked two pans in one go but if you prefer to bake one at a time, go for it.
If you only have one or two half sheet pans and need to rotate batches, pull the baked sheets off onto cooling grids and let the pans cool completely before you continue the above steps with the remaining dough quarters.