Happiness Cake in a Jar

Name: Happiness Cake in a Jar
Ingredients: For the chocolate chip cake and passion fruit curd; 1 recipe butter cake (enough for a 9 x 13 cake); 3/4 cup mini chocolate chips; 1 cup passion fruit puree, divided; 1/3 cup sugar; 2 large eggs; 1/2 teaspoon powdered gelatin; 3/4 cup butter, very cold; 1/2 teaspoon kosher salt; For the chocolate crumbs and coffee frosting; 1 cup Oreo cookie crumbs; 1 cup butter; 1/2 cup confectioner's sugar; 1/3 cup milk; 1 1/2 teaspoons instant espresso powder