Apple Rhubarb Pie Recipe is the perfect blend of sweet and tart. This Cast Iron Skillet pie nestles fresh fruit and flaky crust over a layer of buttery caramel.
Preheat oven to 350°F, and place a baking sheet on the lowest rack to catch any drips from the pie.
Melt butter in a 10-inch cast-iron skillet over medium heat; add the brown sugar, and cook, stirring constantly, 1 to 2 minutes or until sugar is dissolved. Remove from heat and allow to cool slightly.
In a large bowl, add the sliced apples,diced rhubarb, cinnamon, flour, and granulated white sugar. Stir to combine.
Place 1 pie crust in a 10" cast-iron skillet over the brown sugar mixture. Spoon the fruit mixture over pie crust, and top with remaining pie crust.
Whisk the egg with 1 tsp of water until no longer thick. Brush the top of pie crust with the egg wash. Immediately sprinkle the top of the crust with 2 tablespoons granulated or turbinado sugar. Cut 4 or 5 slits in top for steam to escape.
Bake at 350F for 1 hour to 1 hour and 10 minutes or until golden brown and bubbly, shielding with aluminum foil during last 10 minutes if the pie is becoming excessivly brown.
Cool on a wire rack 30 minutes before serving.
Notes
Let the caramel cool before topping with the crust or it will just melt into the caramel.
Depending on how deep your cast-iron skillet is, your bottom crust will not come entirely up the bottom and up the sides of the pan.
I don’t worry about tucking the top crust into the bottom crust. I crimp the edges of the top crust so everyone gets that nice contrast of the flaky crust with the filling and caramel layer.
My egg wash uses both the yolk and white mixed with a teaspoon of water and whipped together.
Many egg washes use only the white, but I’ve found the crust browns more golden by using both.
What eggwash I have left I cook up for my pup. She loves it.
Add the egg wash quickly followed by the sugar.
If it dries, the sugar will not adhere or cook onto the crust and just falls off.
I like turbinado sugar. It’s a coarser sugar that adds a nice crunch.
Don’t try and serve the pieces in slices. Grab a big ole spoon and put it under a layer of ice cream. I dare anyone to complain!
This recipe was calculated using the exact brands and measurements I used to make this recipe. If you are following a strict diet please note changing anything will cause the nutritional info to change. My calculations are intended as a guide only.