Preheat the oven to 425 degrees Fahrenheit.
Prepare the strawberry filling: combine strawberries and ¼ cup of sugar. Set aside.
In a large bowl, combine Bisquick mix, milk, butter, and 3 tablespoons of sugar. Stir just until you form a soft dough.
Drop spoonfuls of dough onto a baking sheet to form 6 shortcake discs. Since the batter has a lot of butter, there's no need to grease the baking sheet.
Bake the shortcakes for 10 to 12 minutes, or until golden brown.
While the shortcakes are baking, prepare the whipped cream. In a separate bowl, beat the whipping cream using an electric mixer on high speed until it forms soft peaks.
Assemble the cakes: Slice the shortcakes in half crosswise. Fill and top with strawberries and whipped cream.