Preheat oven 350 degrees Fahrenheit (176 C). Grease a 9x13 or slightly smaller baking dish with butter.
Make the thick Peach Filling. In a skillet over medium-low heat add the filling ingredients: peaches, peach juice, cinnamon, lemon juice, cornstarch, brown sugar.
Stir these ingredients together, ensuring they are well combined. Allow the mixture to simmer gently until it becomes bubbly and thickens to a suitable consistency.
Take care not to overcook it; you want it thick but not overly so. If needed, reduce the heat to low.
Once the peach filling is ready, transfer it to the prepared baking dish. Take 2 tablespoons of butter and distribute them in different places across the peach mixture.
If you love the cinnamon flavor you can sprinkle more cinnamon on top of the peaches.
Note: In the last step, both butter and cinnamon addition creates a truly hearty filling, but they can be left out completely in this step, if needed. Please note that texture will be different as well.
Make the Cobbler Topping. In a bowl, combine dry ingredients: flour, 5 tablespoons of oats (we will reserve the rest for later), sugar, baking powder, and salt.
Cut the cold butter into the flour mixture until it resembles crumbles. Take your time and be thorough in this step. See picture below.
In batches, gradually pour in the cold cream. Stir gently to lightly combine the ingredients. Pay close attention to this step, as it is crucial and can be easily mishandled.
Avoid over-stirring or rushing the process, and ensure that the cream is adequately chilled. The resulting mixture will be thick and somewhat sticky due to the flour.
Take the chunks of flour mixture and place them on top of the peach filling, leaving some space between them to allow the peaches to peek through.
If you prefer, you can sprinkle the remaining oats or additional oats on top for added texture and flavor.
Bake. Place the baking dish in the preheated oven and bake for approximately 30 minutes.
Keep an eye on it until the top turns a beautiful golden brown, and the peach mixture beneath is bubbling.
Once done, carefully remove the peach cobbler from the oven. Allow it to cool for a few minutes before serving. Enjoy with vanilla bean ice cream and a drizzle of caramel sauce.