Individual Strawberry-Jam Cakes

Why I Love This Recipe
These little muffin-cakes are a favorite in my house as an after-school snack. I also like to have mine with tea.
From Martha Stewart Living Magazine
Ingredients You'll Need
1/2 cup (1 stick) unsalted butter, room temperature, plus more for greasing tin
3/4 cup granulated sugar
1 teaspoon finely grated orange zest
2 large eggs, separated
1 1/2 cups all-purpose flour
1/2 teaspoon baking powder
1/4 teaspoon salt
1/4 cup milk
6 tablespoons strawberry jam
1 1/2 cups confectioner's sugar
1/4 cup freshly squeezed orange juice
Directions
Preheat your oven to 350 degrees.
Butter a standard 6-cup muffin tin; set aside.
In a medium bowl, beat butter, granulated sugar, and zest until light and fluffy.
Beat in egg yolks one at a time until creamy; set aside.
Into a small bowl, sift flour, baking powder and salt.
Add flour mixture in alternating batches to butter mixture; set aside.
In a clean bowl, whisk egg whites to soft peaks; fold into batter.
Divide half of batter among muffin cups.
Make an indentation in the middle of each; fill with 1 tablespoon jam.
Top with remaining batter.
Bake until a cake tester inserted in top cake layer comes out clean, about 30 minutes.
Unmold cakes, and transfer them to a wire rack to cool.
In a small bowl, whisk together confectioner's sugar and juice.
Place rack over parchment paper; drizzle cakes with glaze.
Makes 6 small cakes