01 -
Heat the oven to 350°F and grease an 11-by-7-inch baking dish.
02 -
Measure the specified 15.5 ounces of strawberry cake mix. Mix it with melted butter, eggs and one teaspoon vanilla until evenly combined.
03 -
Spread the thick batter across the prepared dish. Bake about sixteen to eighteen minutes, continuing if necessary until the center is set and a tester shows no wet batter.
04 -
Cool completely in the pan.
05 -
Wash and hull the strawberries, then puree with the remaining teaspoon vanilla using clean equipment. Stir puree gradually into powdered sugar with the salt until the glaze is spreadable, adding more sugar only if needed.
06 -
Spread over the cooled bars and refrigerate until set. Cut into portions with a clean knife and keep refrigerated.