• 4 1/2 ounces unsalted butter, softened
• 5 3/4 ounces brown sugar
• 1 teaspoon vanilla extract
• 7 1/2 ounces all-purpose flour
• 2–4 tablespoons warm milk
• 4 1/2 ounces dark mini chocolate chips
• 4 1/2 ounces rainbow sprinkles
• Strawberry ganache layer
• 10 1/2 ounces white chocolate, chopped
• 3 1/2 fluid ounces thickened whipping cream
• 1 teaspoon strawberry flavouring
• 6 3/4 fluid ounces boiling water
• 6 3/4 fluid ounces cold water
• 1 teaspoon vanilla extract