Heat the oven and prep the pan
Preheat to 325 °F (160 °C). Spray a 10-cup Bundt pan with nonstick spray and dust with flour, tapping out the excess so the swirl releases cleanly.
A fluffy, marbled pound cake inspired by Philadelphia bakery traditions. Cream cheese enriches the batter while a deep chocolate swirl adds contrast in both flavor and presentation.
Preheat to 325 °F (160 °C). Spray a 10-cup Bundt pan with nonstick spray and dust with flour, tapping out the excess so the swirl releases cleanly.
Whisk together cake flour, baking powder, and salt until evenly combined. Set aside.
Beat cream cheese, butter, and vegetable shortening until pale and fluffy (3 min). Sift in dry ingredients on low and mix until combined (1 min).
In a 2-cup liquid measuring cup, whisk together eggs and vanilla extract; set aside. With stand mixer running on low, slowly add 1 cup granulated sugar, then slowly pour in egg mixture. Add remaining sugar and beat until smooth, about 2 minutes, scraping the edges and bottom of bowl as needed to ensure mixture is well combined.
Whisk chopped chocolate, sugar, cocoa, and espresso powder. Add hot water and stir smooth. Fold in 1 ½ cups of batter to create the swirl.
Spoon half of the vanilla batter into the pan, dollop the chocolate on top, cover with the rest of the vanilla, and drag a knife through to swirl.
Bake 55–65 min until golden and a toothpick comes out clean. Cool 25 min, then invert and let cool completely before finishing.
Dust the cooled cake with confectioners' sugar or drizzle with warm chocolate sauce. Slice with a serrated knife for clean edges.
The cake can be stored in an airtight container at room temperature for up to 3 days or refrigerated for up to 5 days.