Dark brown sugar is used in baked beans for its rich molasses flavor, which adds depth and complexity to the dish’s taste. It also contributes to a slightly chewier texture and helps retain moisture. 

Brown Sugar Baked Beans 

Ingredients

• 1 yellow onion, finely diced
• 15.5 ounce can of kidney beans, rinsed and drained
• 15.5 ounce can pinto beans, rinsed and drained
• 15.5 ounce can northern beans, rinsed and drained
• ½ cup ketchup
• ¾ cup water
• 1/3 cup dark brown sugar, unpacked
• 1 Tbsp. yellow mustard
• 1 tsp. chili powder

Directions

For Instant Pot: 

1. Add the ingredients to the insert and stir them together well.
2. Place the lid and lock. Set to Manual, High Pressure, and set for 8 minutes.
3. Once finished, release natural pressure for about 10-15 minutes, then quick release by removing the lid.
4. Stir before serving.

For Slow Cooker: 

1. Add the ingredients to the slow cooker and stir them together well.
2. Cover and cook low for 6 to 7 hours. Stir before serving.

Source: https://www.skinnytaste.com/brown-sugar-baked-beans/