#### 1. **Prepare the Base:**
- Preheat your oven to 375°F (190°C).
- Crush the crackers finely and mix with melted butter. Spread evenly in a greased 9x13-inch baking dish.
#### 2. **Mix the Egg Filling:**
- In a large bowl, whisk together eggs, milk, flour, baking powder, salt, pepper, and optional garlic powder until smooth.
#### 3. **Assemble the Casserole:**
- Sprinkle 1 cup of shredded cheese over the cracker base.
- Pour the egg mixture evenly over the cheese and crackers.
- Top with the remaining 1 cup of shredded cheese.
#### 4. **Bake:**
- Place the dish in the oven and bake for 35–45 minutes, or until the top is golden and the center is set.
- Let the casserole rest for 5–10 minutes before slicing and serving.