I got this recipe from allrecipes.com. It was really tasty! I made it for my son's birthday. He loves strawberries and requested a strawberry cake. My daughter and son decorated the top with strawberries.
2 cups white sugar
1 (3 ounce) package strawberry flavored gelatin
1 cup butter, softened
4 eggs (room temperature)
2 3/4 cup sifted cake flour
2 1/2 tsp baking powder
1 cup whole milk, room temperature
1 tablespoon vanilla extract
1/2 cup strawberry puree made from frozen sweetened strawberries (I used unsweetened and it still turned out fine)
Preheat the oven to 350 degrees F. Grease and flour two 9 inch round cake pans. In a large bowl, cream together the butter, sugar and dry strawberry gelatin until light and fluffy. Beat in eggs one at a time, mixing well after each. Combine the flour and baking powder; stir into the batter alternately with the milk. Blend in vanilla and strawberry puree. Divide the batter evenly between the prepared pans. Bake for 25 to 30 minutes in the preheated oven, or until a small knife inserted into the center of the cake comes out clean. Allow cakes to cool in their pans over a wire rack for at least 10 minutes, before tapping out to cool completely.
For the frosting I found this one on whatmegansmaking.com and changed it just a bit.
1 stick butter, at room temperature
4 cups powdered sugar, sifted 1/2 cup finely chopped fresh strawberries and juice
2 tablespoons milk
Place the softened butter in a large mixing bowl and blend with an electric mixer on low speed until fluffy, 20 seconds. Add the powdered sugar and strawberries. Blend on low speed until the frosting is creamy and of a spreadable consistency. This is where I added some milk to make it a little thinner and easier to spread.