Preheat the oven to 375°F (190°C) and line a baking sheet with parchment paper.
In a large bowl, gently combine crab meat, cheddar cheese, eggs, breadcrumbs, green onions, parsley, mayonnaise, garlic, lemon juice, Old Bay seasoning, salt, and pepper.
Shape the mixture into evenly sized patties and place them on the prepared baking sheet.
Bake for 25–30 minutes until the crab cakes are golden brown and set.
While baking, melt butter in a small saucepan over low heat. Stir in lemon juice and garlic powder. Keep warm.
Drizzle warm lemon butter over the crab cakes just before serving.