Kue Mentega Es Krim Berry Berputar

Bahan-bahan (8 porsi)

• 1 (9x5 inch) vanilla butter pound cake ((homemade recipe follows))
• 1 1/2 pints strawberry ice cream
• 1 1/2 pints blackberry or raspberry gelato
• 3/4 cup blackberry or raspberry jam
• 1 cup heavy cream
• 1 teaspoon vanilla extract
• 1 -2 tablespoons powdered sugar ((optional))
• fresh berries and stone fruit, for topping