01 -
Set your oven to 350℉ and let it heat up.
02 -
In a bowl, combine the cake mix, sour cream, eggs (lightly whisked), oil, and vanilla. Add the mashed sweet potatoes and stir until smooth.
03 -
Grease a 9 x 13-inch pan and pour in half the cake batter.
04 -
Use a smaller bowl to mix the brown sugar, nutmeg, and cinnamon. Stir in the pecans until evenly coated.
05 -
Spread the filling mixture over the first layer of cake batter. Add the rest of the batter on top. Swirl gently with a knife to combine.
06 -
Put the dish in the oven and bake for 40–45 minutes. Check with a toothpick, and if it comes out clean, it’s ready.
07 -
Place powdered sugar in a small bowl. Gradually add a tablespoon of milk at a time and stir until you can drizzle it. Pour over the warm cake.