Preheat oven to 350℉. Gather ingredients so that you have everything close at hand on the counter or table.
Prepare the Cake Mix
In a large mixing bowl, combine 16 oz white cake mix, 1 cup sour cream, 1/4 cup water and 3 large eggs. Beat on medium high for 3 minutes.
Spread the batter into a greased baking sheet or jelly roll pan.
Drop 21 oz. cherry pie filling in 15 spoonfuls, dividing the filling evenly over the batter.
Bake in preheated oven for 25-30 minutes until the cake springs back when touched. Allow to cool.
Make the Glaze
While the cake is cooling, prepare the icing. In a small bowl combine 1 1/2 cups powdered sugar, 2 tablespoons whole milk, and 1/2 teaspoon almond extract. Mix together with a whisk until smooth.
Spread the glaze over the cooled cake and sprinkle with 1/3 cup sliced almonds. Serves 15.