Cool, creamy icebox cake layered with wafers and whipped cream is a no-bake family dessert that magically softens overnight. This vintage, refreshing treat is perfect for hot summer days.
Chill a mixing bowl and the beaters in the refrigerator for at least 15 minutes to keep the whipped cream cold and stable.
Combine the heavy whipping cream, powdered sugar, and vanilla extract in the chilled bowl. Whip on medium-high speed until stiff peaks form, paying attention not to over-whip and turn it grainy.
Layer chocolate wafer cookies in the base of a 9-inch loaf pan or dish, arranging them evenly for full coverage.
Spread a generous layer of whipped cream over the cookies, making sure to reach the corners, then repeat the layering process until all cookies and cream are used up. Finish with a whipped cream layer on top.
Cover tightly and refrigerate overnight (at least 8 hours), allowing the wafers to soften and meld with the cream. Slice and serve cold for best texture.