Christmas Cranberry, Orange and Choc Dipped Biscuits

Ingredients

• 115g unsalted butter, softened to room temperature
• 1 teaspoon orange zest, finely grated
• 1/2 cup granulated sugar
• 1 teaspoon vanilla extract
• 1 large egg, at room temperature
• 1 1/2 cups all-purpose flour
• 1 cup dried cranberries
• 225g dark chocolate, chopped