Ingredient:

• 2 cups graham cracker crumbs
• 3 tablespoons sugar
• 6 tablespoons butter, melted
• 3 packages (8 ounces each) cream cheese, softened
• 1 cup sugar
• 3 large eggs, room temperature
• 1 cup sour cream
• 1 teaspoon lime juice
• 1 teaspoon grated lime zest
• 1 teaspoon vanilla extract
• 1-1/2 cups fresh blackberries
• 3 tablespoons sugar