From the Culinary Institute of America book 'Breakfasts and Brunches'. These muffins look fantastic, so I'm putting the recipe here for safe keeping. I haven't tried these yet. The streusel recipe makes 2 cups, but you'll only need 3/4 cup for this recipe. I would store the remainder in the fridge for my next batch of muffins. If you don't have pecans, feel free to substitute a different type of nut.