01 - Preheat oven to 375°F. Line a 12-cup muffin tin with paper liners or coat with nonstick spray.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, salt, ground ginger, cinnamon, cloves, and nutmeg.
03 - In a large bowl, whisk brown sugar, molasses, eggs, whole milk, vegetable oil, and vanilla extract until smooth.
04 - Add dry mixture to the wet ingredients and gently fold until just combined, avoiding overmixing.
05 - Divide batter evenly among muffin cups, filling each about two-thirds full.
06 - In a small bowl, combine flour, brown sugar, cinnamon, and ginger. Cut in cold unsalted butter using a pastry cutter or fork until crumbly.
07 - Sprinkle streusel topping evenly over each filled muffin cup.
08 - Bake for 18 to 20 minutes, or until a toothpick inserted into the center comes out clean.
09 - Let muffins cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.