Dark Chocolate Black Bean Brownies

Ingredients

• 1/4 cup rolled oats
• 1/4 teaspoon salt
• 1/2 teaspoon baking soda
• 2 tablespoons ground flax seeds
• 1/2 cup dark cocoa powder
• 1 can (15 oz.) black beans, rinsed
• 1/4 cup creamy peanut butter
• 3 teaspoons vanilla extract
• 3/4 cup sugar
• 3 teaspoons lemon juice or apple cider vinegar
• 1 cup dark chocolate chips, plus extra to top