Flourless chocolate cake

Instructions

1. Preheat oven to 350°F. Coat a 9-inch springform pan with nonstick spray. Sift 1 Tbsp cocoa into pan; tilt pan to coat bottom and sides with cocoa.
2. Combine chocolate and butter in a medium microwavable bowl; cover with wax paper and microwave on High until chocolate softens and butter begins to melt, 1 minute. Stir until smooth; allow to cool.
3. Sift remaining 2 Tbsp cocoa into a small bowl; add sour cream, mix until smooth, and set aside.
4. Using an electric mixer with the whisk attachment, beat egg yolks and 1/3 c granulated sugar in a large bowl at medium-high speed until thick and lemon-colored. At low speed, beat in chocolate mixture and vanilla extract. Add sour cream mixture, gently folding with rubber spatula until blended; fold in almond flour.
5. With the electric mixer and a clean whisk attachment, beat egg whites and salt in another large bowl at medium speed until soft peaks form when beaters are lifted. Add remaining 1/2 c granulated sugar, 2 Tbsp at a time, until blended. At medium-high speed, beat until firm (but not too stiff), glossy peaks form, about 2 minutes.
6. Spoon 1/3 of beaten egg whites over chocolate mixture, gently fold just until whites are incorporated; repeat with remaining beaten whites. Pour into prepared pan and smooth top. Bake until toothpick inserted in center comes out clean, about 40 minutes.
7. Cool cake completely in pan on a rack, about 1 hour. Run knife around edge of pan; remove side of pan. Dust top with powdered sugar and cut into 12 slices with a warm, clean knife; serve with raspberries.
8. Serving size: 1 slice