Caramel drizzle (homemade or store-bought)(optional)
Instructions
For the cake:
Heat the oven to 350°F. Lightly grease a 6-inch springform pan and set it aside.
In a small bowl, whisk together the flour, baking powder, and cinnamon. Set aside.
In a separate mixing bowl, beat the softened butter and granulated sugar until light and creamy, about 2 minutes.
Add the egg and vanilla and mix until fully incorporated and smooth.
Stir the dry ingredients into the butter mixture just until combined. Add the heavy cream and mix gently until a thick, even batter forms.
Spread the batter evenly in the prepared pan, smoothing the top.
Arrange the sliced apples over the batter, overlapping slightly so they cover the surface in even layers.
For the streusel:
To make the streusel, combine the flour, sugar, oats, and cinnamon in a small bowl. Pour in the melted butter and mix with a fork until clumps form and no dry spots remain.
Sprinkle the streusel evenly over the apples, breaking up any overly large chunks with your fingers.
Bake for 40–45 minutes, checking near the end. The cake is done when a toothpick inserted into the center comes out clean or with a few moist crumbs and the top is lightly golden.
Let the cake cool in the pan for about 10 minutes, then release the springform ring.
Cool completely or serve slightly warm. Dust with powdered sugar just before serving, if desired.