Special equipment:

1 (6-inch) cake ring
2 strips acetate, each 3 inches wide and 20 inches long

For the chocolate chip layer cake:

1 recipe chocolate chip cake (recipe follows)
1⁄3 cup passion fruit puree
1 recipe passion fruit curd (recipe follows)
1/2 recipe chocolate crumb (recipe precedes this recipe)
1 recipe coffee frosting (recipe follows)
1/4 cup mini chocolate chips

For the chocolate chip cake:

8 tablespoons (1 stick) butter, at room temperature
1 1/4 cups granulated sugar
1/4 cup tightly packed light brown sugar
3 eggs
1/2 cup buttermilk
1/2 cup grapeseed oil
1 tablespoon vanilla extract
1 1/2 cups cake flour
1 teaspoon baking powder
1 teaspoon kosher salt
Pam or other nonstick cooking spray (optional)
3/4 cup mini chocolate chips

For the passion fruit curd:

1/2 cup passion fruit puree
1⁄3 cup sugar
2 eggs
1 gelatin sheet
12 tablespoons (1 1/2 sticks) butter, very cold
1/2 teaspoon kosher salt
For the coffee frosting:
8 tablespoons (1 stick) butter, at room temperature
1/4 cup confectioners’ sugar
1/4 cup milk
3/4 teaspoon instant coffee powder
1/4 teaspoon kosher salt