Preheat and prep: Heat your oven to 375°F (190°C). Line two baking sheets with parchment paper and set aside.
Mix the dry ingredients: In a large bowl, whisk the all-purpose flour, whole wheat flour, baking powder, salt, and sugar or honey (if using).
Add oregano, basil, garlic powder, onion powder, and red pepper flakes.
Stir in flavor boosters: Add the tomato paste and olive oil to the bowl. Use a fork or your fingers to rub the tomato paste and oil into the flour until it looks like damp sand with tiny clumps.
Add water and microgreens: Pour in the water, starting with 1/2 cup. Add the chopped microgreens and Parmesan or nutritional yeast if using.
Mix with a spatula until a rough dough forms. If it feels dry, add water 1 tablespoon at a time.
Knead briefly: Turn the dough onto a lightly floured surface and knead 5–8 times, just until smooth. Don’t overwork it.
Divide and roll thin: Split the dough in half.
Roll the first half very thin—about 1/16 to 1/8 inch. The thinner the dough, the crisper the crackers. Dust with flour as needed to prevent sticking.
Cut and arrange: Use a knife, pizza wheel, or small cutter to cut into squares or shapes.
Transfer to a lined baking sheet, leaving a little space between pieces. Repeat with the second half of the dough.
Finish with toppings: Brush lightly with olive oil. Sprinkle with flaky salt or sesame seeds if you like.
Bake: Bake for 12–16 minutes, rotating the pans halfway through.
Crackers should be slightly browned at the edges and firm to the touch. Thicker crackers may need a couple more minutes.
Cool and crisp: Let the crackers cool completely on a wire rack. They’ll crisp up as they cool.