Fudgy Chocolate Walnut Cake - California Prunes

Ingredients

• 1 cup California Prunes
• 1 cup buttermilk
• ⅓ cup olive oil
• 2 tablespoons instant coffee granules
• 3 large eggs
• 1 ¾ cup sugar
• 1 tablespoon vanilla extract
• 2 cups (minus 2 tablespoons) gluten-free flour
• 1 cup cocoa powder
• 2 teaspoons baking powder
• 1 teaspoon baking soda
• 1 teaspoon salt
• ½ cup semi-sweet chocolate chips
• ½ cup toasted, salted walnuts
• 1 cup semi-sweet chocolate (melted)
• Flaky sea salt (for topping)