Pumpkin Swirl Brownies

I've noticed lately that a lot of recipes I'm really liking come from Smitten Kitchen. These too. I saw this recipe last year, made them once, and thought I'd make them again this week. We had some friends over for dinner the other night, so I whipped them up then.

A couple of notes on the recipe first:

• If you don't have a 9x9-inch pan, I wouldn't use an 8x8. I've got an 8x8, and they come out too thick. Next time I make them, I think I'll use my 11x7 and see how that works.
• Don't split up the base batter the way the recipe instructs. Start with 1 cup in each of two bowls, then add the rest of the ingredients to each bowl. After that, continue to divide the base batter as needed.

Pumpkin-Swirl Brownies

8 tablespoons (1 stick) unsalted butter, plus more for pan
6 ounces bittersweet chocolate, chopped
2 cups all-purpose flour
1 teaspoon baking powder
1/8 teaspoon cayenne pepper
1/2 teaspoon salt
1 1/2 to 3/4 cups sugar (the original recipe calls for the larger amount; I think it could be dialed down a bit)
4 large eggs
1 tablespoon pure vanilla extract
1 1/4 cups solid-pack pumpkin
1/4 cup vegetable oil
1 teaspoon ground cinnamon
1/4 teaspoon ground nutmeg
1/2 cup chopped hazelnuts or other nuts (optional)

1. Preheat oven to 350 degrees. Butter a 9-inch square baking pan or dish. Cut a length of parchment that will cover the bottom and two sides (makes it much easier to remove), and line the pan with it. Butter the lining as well. (Deb note: I used an 8-inch square, because it was what I had. It works, too, but the brownies are crazy thick and take much longer to bake, just to give you a heads-up.)

2. Melt chocolate and butter in a heatproof bowl set over a pan of simmering water, stirring occasionally until smooth.

3. Whisk together flour, baking powder, cayenne, and salt in a large bowl; set aside. Put sugar, eggs, and vanilla in the bowl of an electric mixer fitted with the paddle attachment; beat until fluffy and well combined, 3 to 5 minutes. Beat in flour mixture.

4. Pour half of batter (about two cups) into a separate bowl and stir chocolate mixture into it. If you find that it is a little thick (as mine was) add a little more batter (a few tablespoons or so) until it is more pourable. This is important because mine was quite thick, and the pumpkin half was quite thin, so I had trouble swirling the two together.

5. In other bowl, stir in the pumpkin, oil, cinnamon, and nutmeg. Transfer half of chocolate batter to prepared pan smoothing top with a rubber spatula. Top with half of pumpkin batter. Repeat to make one more chocolate layer and one more pumpkin layer. Work quickly so batters don’t set.

6. With a small spatula or a table knife, gently swirl the two batters to create a marbled effect. Be sure to get your knife all the way to the bottom of the pan–I didn’t, and ended up with a chocolate base, not that it is such a bad thing. Sprinkle with nuts, if using.

7. Bake until set, 40 to 45 minutes. Let cool in pan on a wire rack. Cut into 16 squares.