Start by preheating your oven to 350°F (175°C). While it heats, place the butter in your baking dish and let it melt inside the oven. This creates a rich base and prevents sticking. I love how this step adds flavor right from the start.
In a mixing bowl, combine the flour, sugar, baking powder, and salt. Whisk everything together so it’s evenly distributed. This ensures the cobbler bakes evenly without any lumps or uneven texture.
Pour in the milk and vanilla extract, then stir until you get a smooth batter. It should be pourable but not too thin. I always make sure not to overmix, as that can make the cobbler dense.
Carefully pour the batter over the melted butter in the baking dish. Do not stir it. Spoon dollops of peanut butter and strawberry jam evenly over the batter. As it bakes, everything magically layers itself.
Place the dish in the oven and bake for about 35–40 minutes. The top should turn golden brown, and the jam will bubble through the surface. The aroma at this stage is absolutely amazing.
Let the cobbler cool slightly before serving. This helps it set and makes it easier to scoop. I usually wait about 10 minutes before diving in.