GRAHAM CRACKER CRUST:
Preheat oven to 350 F and line 18 muffin tins with cupcake liners.
Using a food processor, combine graham crackers with melted butter. {The mixture should hold together when pressed with fingers.}
Sprinkle 1 tablespoon of the crushed graham cracker into the bottom of each prepared muffin tin. Press down using fingers to form a bottom layer and bake for 3-5 minutes or until slightly browned. Remove from oven, setting aside to cool.
CAKE:
In a medium-sized mixing bowl, beat the egg whites until stiff, glossy peaks appear, about 3-4 minutes. {Be careful not to overheat!} Set aside.
In another bowl, mix together the flour, baking powder, and salt. Set aside.
In a separate large bowl, cream together butter and sugar until light and fluffy. Add in the vanilla and beat on low speed. Add half the flour mixture until incorporated. Mix in the sour cream. Add remaining flour and mix until just blended.
Gently fold 1/2 of the egg whites into the batter until combined. {Again, be careful not to over mix.} Add remaining egg and fold in the chopped strawberries.
Fill each muffin tin 3/4 full and bake for approximately 20 minutes, depending on your oven. {You can test whether or not the cupcakes are done by sticking a toothpick through the center. If it comes out clean, it is done!}
CREAM CHEESE FROSTING:
In a large mixing bowl, beat the room temperature cream cheese, butter, and vanilla until smooth. Add the sugar slowly in small batches, beating on low speed until incorporated.
Once all sugar has been added, increase the speed to high, and mix until light and fluffy.
Refrigerate for 1 hour.
When ready to serve, spread frosting on cupcakes or use a pastry bag with a tip. Garnish with freshly sliced strawberries and sprinkles of graham cracker crumbs. Refrigerate until ready to serve. Store extras in the refrigerator. Enjoy!