I saw you’d started to mention sugar in your post above. Are you saying you have a sweet tooth or that you’re stuck for substitutions?
All carbs count as they put your blood sugar up - so sugar, bread, pasta, rice, potatoes, etc. If you really want say, a mini mince pie, you could choose to limit other carbs in that meal to ‘allow’ yourself the mince pie.
If you’re going to be eating desserts, then some of the shop-bought cream gateaux aren’t too carby as long as you stick to a small portion. Strawberries and cream is a nice dessert too, and then some cheese after your meal. You don’t need biscuits to enjoy it. If you do want a biscuit with it, look for the crackers with less carbs eg 3g per cracker rather than a digestive which is 10g.
Carefully and consistently limiting carbs and trimming them down where you can, will help your blood sugar, and you can still have lovely food.