01 - Preheat oven to 375°F. Line a baking sheet with parchment paper.
02 - In a large bowl, whisk together flour, cornmeal, baking powder, chili powder, cumin, smoked paprika, garlic powder, onion powder, and salt until well blended.
03 - Add olive oil and water to the dry mixture. Stir until a cohesive dough forms. Add additional water teaspoon by teaspoon if dough appears too dry or crumbly.
04 - On a lightly floured surface, roll out dough to approximately 1/8-inch thickness using a rolling pin.
05 - Cut dough into 1-inch squares using a knife or pizza cutter. Alternatively, use small cookie cutters for desired shapes.
06 - Transfer crackers to prepared baking sheet. Sprinkle with shredded cheddar cheese and dried oregano if using.
07 - Bake for 12-15 minutes until crackers are golden brown and crisp. Allow to cool on baking sheet for 5 minutes before transferring to wire rack to cool completely.
08 - Store in an airtight container for up to one week.