Savory Tomato Soup Snacking Cake

What if you could experience the warmth of rich, creamy tomato soup combined with gooey grilled cheese all at once? What if it was in the form of an airy cake? Seems mind-blowing, right? That's the sensation I hoped for (and nailed!) when developing this savory cake. I love making desserts with a savory spin because it's an excuse to enjoy our favorite treats all day long. Plus, I like the challenge of turning something familiar on its head.

• 1 cup caramelized onions (from 3 to 4 large onions)
• 1 cup drained oil-packed or reconstituted sun dried tomatoes, divided
• 1 cup (4 ounces) shredded parmesan cheese
• 1/2 cup (2 ounces) shredded cheddar cheese
• 2 2/3 cups (319 grams) all-purpose flour
• 1 tablespoon baking soda
• 2 teaspoons baking powder
• 2 tablespoons brown sugar
• 3/4 teaspoon fresh ground black pepper
• 2 teaspoons celery salt
• 1/2 teaspoon garlic powder
• 1 tablespoon Italian seasoning
• 1 tablespoon crushed red pepper flakes
• 3 large eggs
• 1 (10-ounce) can condensed tomato soup
• 1/2 cup olive oil
• 1 cup sour cream