Preheat oven to 425°F
In a small bowl combine all topping ingredients and cut butter in until crumbly. Set aside.
In a large bowl wisk together all dry ingredients.
In another bowl wisk together all wet ingredients.
Stir together wet with dry until just incorporated. Do not over mix.
Spray a 6 cup jumbo muffin pan with nonstick spray.
Fill cups to about 2/3 full.
Sprinkle topping evenly over all muffins.
Bake in oven for 12 minutes.
Reduce oven temp to 350 (do not open oven door). Bake an additional 15-20 or until cooked through and golden brown. Muffins should spring back when touched and toothpick should come out clean when inserted into the center.
Remove from oven and let stand 5 Minutes. Then transfer to wire rack to complete cooling.
Serve warm or cooled.
Makes about 6 jumbo muffins.