This easy sourdough appetizer features deeply caramelized onions and creamy brie cheese melted over crisp sourdough bread. It’s a crowd-pleasing, sophisticated snack or starter that’s ready in under 30 minutes and perfect for any occasion.
For best results, caramelize onions slowly over medium-low heat. Use sturdy bread to hold toppings. Brie melts best at room temperature. Prep onions ahead for faster assembly. Add honey or fresh thyme for extra flavor. For gluten-free, use GF bread; for dairy-free, use vegan brie and butter.
Keywords: caramelized onion, brie toast, sourdough appetizer, easy appetizer, vegetarian, party snack, cheese toast, holiday appetizer, crowd-pleaser, quick appetizer