Chocolate Hazelnut Crepe Cake

Name: Chocolate Hazelnut Crepe Cake
Ingredients: 1/4 cup sugar; 1/3 cup plus 1 Tbs all purpose flour; 1/4 cup cocoa powder; 3 eggs; 150 mL whole milk; 100 mL heavy cream; 1/2 Tbs vanilla bean paste or extract; pinch salt; 3 Tbs melted cooled butter plus more for brushing on pan; 1 pint milk; 1 1/2 teaspoon vanilla bean paste or extract; 5/8 cup sugar; 1 egg; 2 yolks; 1/3 cup corn starch; 1/2 cup hazelnut liquor, Frangelico; 200 ml heavy cream, whipped to medium to stiff peaks.; 1/4 cup butter; 1 1/2 Tbs heavy cream; 1 Tbs cocoa powder; 3/8 cup powder sugar