Topping:
½ cup (63 grams) all-purpose flour¼ cup (50 grams) granulated sugar½ teaspoon ground cardamom¼ teaspoon kosher salt½ cup (57 grams) sliced almonds3 tablespoons (42 grams) unsalted butter, melted
Batter:
½ cup (113 grams) unsalted butter, room temperature1 cup (200 grams) granulated sugar⅓ cup (73 grams) firmly packed light brown sugar¾ cup (168 grams) neutral oil2 large eggs (100 grams), room temperature1 teaspoon vanilla extract¾ teaspoon almond extract3 cups (375 grams) all-purpose flour2¼ teaspoons (11 grams) baking powder2 teaspoons (8 grams) ground cardamom1¼ teaspoons (4 grams) kosher salt2/3 cup (160 grams) sour cream, room temperature½ cup (112 grams) cottage cheese, blended smooth and room temperatureGarnish: confectioners’ sugar
For topping: In a medium bowl, whisk together flour, granulated sugar, cardamom, and salt; stir in almonds. Stir in melted butter until mixture is crumbly.
Preheat oven to 300°F (150°C). Spray a 9-inch springform pan with baking spray with flour. Line bottom of pan with parchment paper.
For batter: In the bowl of a stand mixer fitted with the paddle attachment, beat butter, granulated sugar, and brown sugar at medium speed until light and fluffy, 3 to 4 minutes, stopping to scrape sides of bowl. Add oil, beating until combined. Add eggs, one at a time, beating until combined after each addition and stopping to scrape bottom and sides of bowl. Beat in extracts.
In another medium bowl, whisk together flour, baking powder, cardamom, and salt until well combined. In a small bowl, whisk together sour cream and cottage cheese. With mixer on low speed, gradually add flour mixture to butter mixture alternately with sour cream mixture, beginning and ending with flour mixture, beating until just combined after each addition and stopping to scrape bottom and sides of bowl. Spread batter into prepared pan. Sprinkle topping onto batter.
Bake until edges are golden brown and an instant-read thermometer inserted in center registers 205°F (96°C), 1 hour to 1 hour and 10 minutes. Let cool in pan for 10 minutes. Remove from pan, and let cool completely on a wire rack. Just before serving, garnish with confectioners’ sugar, if desired. Store in an airtight container for up to 3 days.