This is what I found when I looked up nutritional values for a banana muffin
NUTRITION INFO
Serving Size: 1 (990 g)
Servings Per Recipe: 1
AMT. PER SERVING % DAILY VALUE
Total Carbohydrate 28.9 g 9%
Sugars 13.6 g 54%
They're the 2 values I use, carbs are pretty high and the 'of which sugars' are around half the carbs so also pretty high, I'd not eat that
Remember 'sugars' are simple carbs, and 'carbohydrates' are complex ones, complex as in it takes longer for your body to digest them, matching your insulin release (in theory).