Ingredients
Equipment
Method
Brown butter
- Brown the butter until golden and nutty, then cool for 10 minutes so it’s warm but not hot.
Prep and mix
- Preheat the oven to 350F and grease a 9x13 pan so the batter can go in right away.
- Whisk the all-purpose flour, baking powder, cinnamon, cream of tartar, nutmeg, and salt until evenly combined.
- Whisk the browned butter and packed brown sugar until smooth, then whisk in the eggs and vanilla extract until glossy.
- Fold in the flour mixture until just combined, then fold in the finely diced apples so the batter stays thick.
Bake and finish
- Spread the batter into the prepared 9x13 pan and level the top for even baking.
- Mix the sugar and cinnamon for the top, sprinkle generously over the batter, and tap the pan lightly to help it adhere.
- Bake for 25-30 minutes at 350F until a toothpick comes out with just a few crumbs.
- Drizzle caramel over the top, cool completely before slicing, and set the bars to slice cleanly.
Notes
Pro tip: Cool the browned butter for the full 10 minutes so the eggs don’t scramble when they hit warm fat. Store airtight at room temperature up to 2 days or refrigerate up to 5 days; freeze up to 2 months (wrap bars tightly, and drizzle caramel after thawing). For a lighter swap, use half whole-wheat flour (1:1) for part of the all-purpose flour—texture stays chewy, though slightly denser.
