01 - Preheat oven to 375°F and 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 thoroughly combined.
03 - Pour olive oil and water into the dry mixture. Mix until a cohesive dough forms, adding additional water one teaspoon at a time if the mixture is too dry to hold together.
04 - Lightly flour a clean work surface. Roll the dough to approximately 1/8-inch thickness, ensuring even consistency throughout.
05 - Use a knife or pizza cutter to slice dough into 1-inch squares, or cut with a small cookie cutter for custom shapes.
06 - Transfer cut crackers to the prepared baking sheet. Sprinkle with shredded cheddar cheese and dried oregano if desired.
07 - Bake for 12-15 minutes until crackers are golden brown and crisp. Allow to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.
08 - Keep cooled crackers in an airtight container for up to one week to maintain crispness.