So... I have an awful confession to make.  I bake out of a box.  Let me explain- I don't know how to bake, and I don't want to waste the time and ingredients, when there's a chance that it won't turn out right.  But, when you use a box, it always comes out perfect, and I always have everything I need for it.
Not today.  Dan and I were having friends over (why do we always try new things when people will be there to witness it?), and I have been craving coffee cake REALLY BADLY.  And naturally, they HAD to be individual serving sizes- hence the muffinness. :)
So I went on a search for a yummy coffee cake recipe.  Obviously, I turned to pinterest.com.  If you haven't yet discovered this gem of a website, stop reading this (you won't hurt my feelings), and go request an invite.  NOW!  Okay, so I found this recipe from marthastewart.com.  You can't get much better than Martha.  So this one is at marthastewart.com/coffee-cake-muffins.  Based on the comments, I doubled the cinnamon for the streusel, and I didn't have jumbo muffin pans, so I made regular ones, and baked them for 20 minutes.  It made 15 of them.
So these are them:
| I'm a little partial, but I think mine actually look better than Martha's. :) | 
Ingredients
For The Muffins
- 1/2 cup (1 stick) unsalted butter, room temperature
 - 1 3/4 cups all-purpose flour (spooned and leveled)
 - 2 teaspoons baking powder
 - 1 teaspoon baking soda
 - 1 cup sour cream
 - 1 cup granulated sugar
 - 2 teaspoons pure vanilla extract
 - 2 large eggs
 
For The Streusel Topping
- 1 cup packed dark-brown sugar
 - 1 cup all-purpose flour, (spooned and leveled)
 - 1/2 teaspoon salt
 - 1/2 teaspoon ground cinnamon
 - 1/2 cup (1 stick) chilled unsalted butter, cut into small pieces
 
Directions
- Prepare streusel topping: In a medium bowl, stir together brown sugar, flour, and salt. With a pastry blender or two knives, cut in butter until mixture resembles large coarse crumbs; refrigerate until ready to use.
 - Preheat oven to 350 degrees. Prepare muffins: Place cupcake liners in pan. In a small bowl, whisk together flour, baking powder, and baking soda; set aside.
 - Using a hand-held mixer on medium speed, beat together butter, sour cream, granulated sugar, and vanilla until light and fluffy. Beat in eggs, one at a time, until well combined. With mixer on low, beat flour mixture into butter mixture.
 - Divide half the batter among prepared muffin cups. Top with half the streusel mixture, then remaining batter, and top with streusel. Bake 20 minutes or until a toothpick inserted in center of a muffin comes out clean. Cool in pan 5 minutes, then transfer to a wire rack to cool completely.
 
