1Heat oven to 350°F (325°F for dark or nonstick pans). Place paper baking cup in each of 18 regular-size muffin cups. Make cake batter as directed on box, adding 1 tablespoon almond extract. Divide batter evenly among muffin cups, filling each about three-fourths full.
2Bake 20 to 25 minutes or until toothpick inserted in center of cupcake comes out clean. Cool in pans 10 minutes; remove from pans to cooling rack. Cool completely, about 30 minutes.
3In medium bowl, beat butter and powdered sugar with electric mixer on low speed until blended. Add whipping cream and 2 teaspoons almond extract; beat on high speed until well blended. Fit a #46 tip in a decorating bag and fill with frosting. Use tip, with smooth side facing down, to generously pipe frosting in circular motion. Store loosely covered.