Chocolate Walnut Cupcakes with Blackberry Buttercream

Ingredients

• 1 cup walnuts
• 1 cup all purpose flour
• 1/2 cup cocoa powder
• 1/4 teaspoon espresso powder optional
• 1 teaspoon baking powder
• 1/4 teaspoon salt
• 3/4 cup sugar
• 2 eggs
• 2 teaspoons vanilla extract
• 3/4 cup water
• 3 large egg whites
• 1 1/4 cups granulated sugar
• 1 pinch salt
• 1 1/2 sticks unsalted butter 6 ounces, or 12 tablespoons, at room temperature
• 1/2 cup blackberry preserves
• 12 blackberries for topping, optional

Nutrition

• Calories : 400 calories
• Carbohydrate : 55 grams
• Cholesterol : 65 milligrams
• Fat : 20 grams
• Fiber : 3 grams
• Protein : 6 grams
• SaturatedFat : 8 grams
• Sodium : 160 milligrams
• Sugar : 42 grams