Syrupy (adjective)

1. Having the consistency or sweet taste of syrup.
2. Excessively sweet or sentimental.
3. Lacking in natural or spontaneous quality.

Origin:

From syrup + -y.

Examples:

1. The syrupy pancakes were too sweet.
2. The syrupy voice of the singer was grating.
3. The syrupy love song was cloying.
4. The syrupy coffee was too sweet to drink.
5. He was pouring syrupy sauce on his pancakes.