Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper or a silicone baking mat to prevent sticking and to ensure even baking.

In a medium-sized bowl, combine the all-purpose flour, cayenne pepper, chili powder, garlic powder, onion powder, salt, and black pepper. Stir the ingredients together until they are evenly distributed.

Pour the melted butter or olive oil into the dry mixture. Stir to combine until the flour mixture becomes slightly crumbly.

Gradually add the cold water, one tablespoon at a time, mixing the dough after each addition. Continue adding water until the dough just begins to come together and is smooth, but not too sticky.

On a lightly floured surface, roll out the dough to about 1/8-inch thickness. The thinner you roll it, the crunchier your crackers will be, so try to get it as thin as possible without tearing.

Cut Into Shapes: Using a knife or a pizza cutter, cut the dough into your desired cracker shapes (squares, rectangles, or even fun shapes like stars or circles). If you'd like, you can use a fork to poke small holes in each cracker for a more traditional look.

Place the cut cracker shapes onto the prepared baking sheet. Bake in the preheated oven for about 12-15 minutes, or until the crackers are golden brown and crisp. Keep a close eye on them, as they can burn quickly once they start to brown.

Once the crackers are baked to a perfect crisp, remove them from the oven and allow them to cool on a wire rack. Enjoy your homemade spicy crackers as a snack on their own or pair them with your favorite dips like salsa, guacamole, or hummus.