Buttermilk Pound Cake

Puree pears in a food processor or blender. Transfer to a medium saucepan and cook over low heat, stirring almost constantly, until reduced to 1 cup, 10 to 12 minutes. (As the puree thickens and spatters less, gradually increase the heat to speed the process.) Transfer to a large bowl and let cool completely.

Preheat oven to 350 degrees F. Lightly oil a 10-inch tube pan or coat with cooking spray.

Melt butter in a small saucepan over medium heat. Cook, swirling the pan, until the butter turns a light, nutty brown, about 60 seconds. Pour into a small bowl, stir in oil and set aside.

Sift flour, salt, baking powder and baking soda into a medium bowl and set aside. Add 1 1/2 cups sugar, buttermilk, vanilla, lemon zest, egg yolks and the butter-oil mixture to the reserved pear puree and whisk until smooth. Add the dry ingredients, in two additions, folding with a whisk just until blended.

Beat the 4 egg whites in a clean mixing bowl with clean beaters until soft peaks form. While continuing to beat, slowly add the remaining 1/4 cup sugar and beat until stiff, but not dry, peaks form. Gently fold the beaten whites into the pear puree mixture with a rubber spatula. Turn the batter into the prepared pan.

Bake until a cake tester inserted in the center comes out clean, 40 to 45 minutes. Let cool in the pan for 5 minutes, then turn out onto a rack to cool, right-side up.