Brimming with oatmeal and spiced with cardamom, cinnamon, and nutmeg, this Apple Oatmeal Skillet Cake is the ultimate soul-warming treat. Our Oat Streusel topping makes it all the more comforting.
Apple Oatmeal Skillet Cake
Makes 1 (10-inch) cake
Ingredients
- 1 cup (80 grams) old-fashioned oats
- 1 cup (240 grams) boiling water
- ½ cup (113 grams) plus 1 tablespoon (14 grams) unsalted butter, cubed, softened, and divided
- ½ cup (120 grams) whole milk, room temperature
- 1 cup (220 grams) firmly packed light brown sugar
- ¼ cup (50 grams) granulated sugar
- 2 large eggs (100 grams), room temperature
- 2 teaspoons (8 grams) vanilla extract
- 1½ cups (188 grams) all-purpose flour
- 1½ teaspoons (3 grams) ground cinnamon
- 1 teaspoon (5 grams) baking soda
- 1 teaspoon (5 grams) baking powder
- ½ teaspoon (1.5 grams) kosher salt
- ¼ teaspoon ground nutmeg
- ⅛ teaspoon ground cardamom
- ⅛ teaspoon ground allspice
- 1 large apple (185 grams), diced
- ½ cup (57 grams) chopped walnuts
- 1 medium apple (140 grams), thinly sliced
- Oat Streusel (recipe follows)
Instructions
- In the bowl of a stand mixer fitted with the paddle attachment, stir together oats, 1 cup (240 grams) boiling water, ½ cup (113 grams) butter, and milk by hand. Cover with plastic wrap, and let stand for 30 minutes.
- Preheat oven to 350°F (180°C). Place remaining 1 tablespoon (14 grams) butter in a 10-inch enamel-coated cast-iron skillet, and place skillet in oven until butter is melted. Carefully remove skillet from oven, and brush sides and bottom of pan with melted butter.
- Stir oats mixture. With mixer on medium speed, add sugars, eggs, and vanilla, beating until well combined, about 2 minutes. Add flour, cinnamon, baking soda, baking powder, salt, nutmeg, cardamom, and allspice, beating just until combined. Fold in diced apple and walnuts. Spoon batter into prepared skillet. Place sliced apple in center, and place Oat Streusel around edges.
- Bake until a wooden pick inserted in center comes out clean, 1 hour to 1 hour and 5 minutes. Let cool for 10 minutes. Serve warm.
Oat Streusel
Makes 1¼ cups
Ingredients
- ¾ cup (94 grams) all-purpose flour
- ½ cup (40 grams) old-fashioned oats
- ⅓ cup (38 grams) chopped walnuts
- ¼ cup (50 grams) granulated sugar
- ¼ cup (55 grams) firmly packed light brown sugar
- ¼ cup (57 grams) unsalted butter, melted and slightly cooled
- ½ teaspoon (1.5 grams) kosher salt
Instructions
- In a medium bowl, stir together all ingredients with a wooden spoon until combined. Crumble with your fingertips until desired consistency is reached.
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This is in the oven now and my house smells amazing. Thanks for including weights, I used my digital scale for accuracy so hoping for great results!
Hi Lisa,
Oh good! We are big proponents of the kitchen scale. Happy baking!
Is enameled cast iron required for this? I have a 10 inch bare cast iron skillet and a 12 inch enameled cast iron skillet.
Hi Cat,
Thanks for reaching out! Our test kitchen found that the enameled cast iron aids in releasing this cake from the pan, but you may have some luck if your cast iron is well seasoned. Because the cake is extra tender from the oats and addition of apples, it will have a higher tendency to crumble, so take extra care (and patience) when you remove slices from the pan! Even if a little crumbly, the cake will still be delicious. Happy baking!