Line two 12-tin regular muffin pans with paper liners.
Spray the liners with cooking spray; set aside.
In a large mixing bowl combine flour, brown sugar, baking powder and salt.
Add crystalized ginger and stir again; set aside.
In a medium mixing bowl combine half-and-half, melted butter, maple syrup, sour cream or yogurt, egg and both extracts.
Whisk until well combined.
Add liquid measure to dry mixture along.
Stir only until moistened.
Do not overmix.
Fill 17 muffin liners almost full with muffin mixture.
Top with Streusel Topping.
Press the topping ingredients into the tops of the batter slightly so crumbs adhere.
Bake at 425º for 5 minutes.
Reduce heat to 350º and continue baking about 15-19 minutes longer, or until a toothpick inserted in center comes out clean.