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.
Cut in butter with a pastry blender until coarse crumbs form. (See note below).
In a medium mixing bowl combine half-and-half or whole milk, maple syrup, sour cream, egg and both extracts.
Whisk until well combined.
Add liquid measure to dry mixture.
Rinse canned peaches in colander; dry between layers of paper towels.
Dice peaches; add to mixture in mixing bowl.
(If using fresh peaches, peel and dice peaches only).
Stir only until moistened.
Do not overmix.
Fill 24 muffin liners almost full with muffin mixture.
Top with Streusel Topping.
Press the 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.