Watermelon Swiss Roll Cake - Pankobunny

Ingredients

• 2/3 cup all-purpose flour
• ½ cup powdered sugar
• 3 tbsp unsalted butter (room temperature)
• 3 large egg whites
• ¼ tsp vanilla extract
• green food coloring
• 5 tbsp unsalted butter (melted and cooled)
• 6 large eggs (yolks and white separated)
• 1 cup sugar
• 1 cup all-purpose flour
• pinch salt
• 2 tsp vanilla extract
• 1 1/2 cups whipping cream (cold)
• 3 tbsp powdered sugar
• 1 1/2 tsp vanilla extract
• pink food coloring
• ¼ cup mini chocolate chips