Found this recipe on a couple different websites and decided to give them a try. They are terrific. The muffin is a bit denser than the average muffin. Make sure to do the glaze as this certainly kicks them up a notch. Hope you enjoy!
In a large bowl, combine the flour, sugar, baking soda and salt. Set aside.
In a medium bowl, whisk together the eggs, yogurt, butter, lemon peel and lemon juice.
Stir the wet ingredients into the dry ingredients. Mix, just until moistened. Let batter rest for 5 minutes.
Grease or paper line muffin cups and fill the cups 3/4 full.
In a small bowl, combine flour, sugar and butter. Using your hands or a pastry blender, mix until it resembles coarse crumbs. Sprinkle the streusel over the batter.
Bake muffins at 350 degrees for 20-25 minutes or until a toothpick inserted into the center of the muffin comes out clean. Cool for 5 minutes and remove onto a wire rack.
Mix together the powdered sugar and enough lemon juice to make a thin glaze. Drizzle over warm muffins.