Prepare Cheesecake Filling by combining cream cheese, granulated sugar, egg, vanilla extract, and flour in a bowl. Mix until smooth.

Make Chocolate Cake Batter by whisking cocoa powder, bittersweet chocolate, and espresso powder, then adding boiling water and mixing gently.

Mix Dry Ingredients including flour, sea salt, and baking soda in a large bowl.

Cream Butter and Sugar together in a stand mixer until light and fluffy, then mix in vanilla extract.

Combine Mixtures by adding eggs one at a time and alternating dry and wet ingredients until just combined.

Assemble Cake by pouring half of the batter into a greased bundt pan, adding cheesecake filling, and topping with remaining batter.

Bake the cake in a preheated oven at 350°F (175°C) for about 1 hour and 10 minutes, then cool for 15 minutes.

Make Ganache Glaze by heating cream and corn syrup, then whisking in chocolate until smooth.

Cool and Glaze the cake with the ganache glaze after the cake has completely cooled.