Marbled Gianduia Biscotti (Chocolate Hazelnut Marbled Biscotti)

Ingredients

• 1/2 cup whole hazelnuts (raw)
• 1/2 cup whole almonds (raw)
• 5 oz semi-sweet chocolate morsels (for melting)
• 1/2 cup unsalted butter
• 1 cup sugar
• 3 eggs
• 1/2 tsp vanila extract (real not imitation)
• 2 tbsp Frangelico
• 3 cups unbleached all purpose flour
• 2 tbsp unbleached all purpose flour
• 1 1/2 tsp baking powder
• 1/4 tsp salt