In a large bowl, mix flour, salt, and baking powder (if using). Add olive oil and stir until crumbly. Gradually add water, one tablespoon at a time, until a soft, pliable dough forms. Adjust with extra water or flour if needed.

Divide dough in half. On a floured surface, roll each half thin (⅛ inch for crackers; thicker for cookies). Cut into shapes using a knife, pizza cutter, or cookie cutters. Place on parchment-lined baking sheets.

Prick tops with a fork to prevent puffing. Sprinkle with coarse salt if desired.

Preheat oven to 375°F (190°C). Bake for 12–15 minutes until edges are golden and tops are dry. Cool on a wire rack.