Activate the Yeast: In a small bowl, mix lukewarm water, dry yeast, and sugar. Let it sit for 5–10 minutes until foamy.
Prepare the Dough: In a large bowl, combine flour, baking powder, and salt. Add the yeast mixture and vegetable oil, mixing until a smooth dough forms.
Let It Rest: Cover the dough and let it rest for 30 minutes to allow the flavors to develop.
Roll & Shape: Roll out the dough thinly on a floured surface. Sprinkle poppy seeds and cheese (if using), pressing them gently into the dough. Cut into squares or desired shapes.
Bake: Preheat the oven to 375°F (190°C). Transfer crackers onto a lined baking sheet and bake for 12–15 minutes until golden brown and crisp.
Cool & Serve: Let the crackers cool completely before enjoying. Serve with dips, cheese, or on their own!