Step 1

In a large saucepan over medium heat, melt the butter and oil together. Add onion slices, sugar, thyme, salt, and black pepper. Cook the onions allowing them to sweat their juices, stirring occasionally, 30-35 minutes.

Step 2

The onions will turn medium golden brown. Add the flour to the onions and stir it through, allowing it to cook for about 1 minute.

Step 3

Turn the heat to medium-high and add the beef broth and wine. Bring soup to a quick simmer; reduce heat to low allowing soup to continue simmering covered for 30 minutes.

Step 4

Serve soup with fresh garlic croutons and melted, bubbly cheese.

Add a small salad and a glass of wine to make it a meal.