Ingredients
Equipment
Method
Preheat and prep
- Preheat the oven to 350F and grease a 9x5 loaf pan. Set it aside so the pan is ready when the batter is mixed.
Mix dry ingredients
- Whisk all-purpose flour, baking powder, baking soda, salt, cinnamon, and nutmeg in a bowl. Whisk until the spices are evenly distributed with no visible clumps.
Mix wet ingredients and combine
- Whisk eggs, granulated sugar, brown sugar, vegetable oil, sour cream, and vanilla extract until smooth. Fold in the flour mixture until just combined to keep the loaf tender.
Add apples
- Fold in diced apples so they’re evenly dispersed throughout the batter. The mixture should look thick and speckled with apple pieces.
Layer batter and cinnamon swirl
- Pour half the batter into the loaf pan. Mix the cinnamon swirl (sugar plus cinnamon) and sprinkle half over the batter for visible cinnamon pockets.
Finish loaf and swirl
- Add the remaining batter on top, then sprinkle the remaining cinnamon sugar. Swirl with a knife to create marbled streaks without fully mixing through.
Bake and cool
- Bake for 55-65 minutes at 350F until a toothpick comes out clean. Let the loaf cool 15 minutes before slicing so the crumb sets and slices cleanly.
Notes
Pro tip: Finely diced apples help distribute moisture evenly, so the loaf stays tender instead of pooling liquid. Store covered at room temperature up to 3 days or refrigerate up to 5 days; freeze slices up to 3 months. For a lighter option, swap sour cream with plain Greek yogurt (same amount) for similar moisture with a tangier flavor.
