Preheat the oven and mix together the granulated sugar and cinnamon in a small bowl and set aside. In a large bowl, whisk together the bread flour, dry pudding mix, baking powder, cinnamon, and salt. Set aside. In a separate large bowl or stand mixer fitted with a paddle attachment, cream together the butter and sugar for 1 minute until smooth. Add in the eggs one at a time, mixing after each just until incorporated.
Immediately, measure the dough into 2.5-ounce (71g) portions of dough and create a well in one half and fill with 2 teaspoons (20g) of dulce de leche filling. Then enclose, pinching to seal, and then rolling into a ball. Roll the balls of dough in the cinnamon sugar mixture and place them on the pan. Add 9 cookies to each pan with 2 inches of space between them. Bake one sheet at a time. Bake for 7 to 9 minutes.