Preheat oven to 350°
Mix together all of the dry ingredients except the pecans.
In a separte bowl, mx together the dry ingredients.
Stir the wet ingredients into the dry ingredients.
Fold in the pecans.
Spoon muffin the mixture into a muffin tin that has been sprayed with non-stick cooking spray or use muffin/cupcake papers.
Mix all of the ingredients for the streusel in a bowl.
Using a fork or your hands (which I prefer) incorporate all the ingredients until you have a mosit but crumbly texture.
Top the muffins mixture with equal amounts of the streusel.
Bake for 35-40 minutes or until an inserted tooth pick comes out clean.
Cool completely before glazing.