Jumbo Zucchini Chip Muffins Recipe

In a large bowl, combine the first six ingredients. In another bowl, combine the eggs, oil and vanilla. Stir into dry ingredients just until moistened. Fold in zucchini, chips and walnuts. Fill paper-lined jumbo muffin cups three-fourths full. Bake at 350 ° for 30-35 minutes or until a toothpick inserted near the center comes out clean. Cool for 5 minutes before removing from pans to wire racks to cool completely. In a large bowl, beat the butter, cream cheese and Mascarpone cheese until fluffy. Add confectioners’ sugar and vanilla; beat until smooth. Pipe a dollop of frosting onto each muffin. Sprinkle with walnuts.