01 - Preheat oven to 350°F (175°C). Line a 12-cup muffin tin with liners or grease lightly.
02 - In a large bowl, whisk together flour, granulated sugar, baking powder, baking soda, salt, cinnamon, nutmeg, and cloves until thoroughly blended.
03 - In a separate bowl, whisk eggs, pumpkin purée, vegetable oil, milk, and vanilla extract until completely smooth.
04 - Add wet ingredients to the bowl of dry ingredients and stir gently until just combined. Take care not to overmix.
05 - Evenly distribute the batter among the muffin cups.
06 - In a small bowl, toss bread cubes with melted butter, brown sugar, and cinnamon until evenly coated.
07 - Sprinkle streusel over each portion of muffin batter, pressing gently to secure the cubes.
08 - Bake for 20 to 22 minutes, or until a toothpick inserted in the center of a muffin comes out clean.
09 - Allow muffins to cool in the tin for 5 minutes, then transfer to a wire rack. Drizzle with maple syrup before serving, if desired.