The National Obesity Forum said the bars, weighing in at up to 555 calories per 100g, made a mockery of the food manufacturer's role in the Government-led "Responsibility Deal" programme to cut the calorie content of sweets and treats.
Nestle's Wonka range includes three varieties, Chocolate Nice Cream, containing vanilla creme and chocolate sauce, Millionaire's Shortbread, containing soft caramel and crumbly biscuit, and Creme Brulee, vanilla creme and caramel crunch.
Dairy Milk with Oreo biscuits packs 560 calories per 100g, 48.5g of sugar and 20.5g of saturated fat.
Dairy Milk contains 530 calories per 100g, 6 more than Wonka Nice Cream but less than both Millionaire's Shortbread, 554, and Creme Brule 555.
This unique environment means they can become very reactive and be used as catalysts.
The ideas behind nanoscience are often easier to understand when considered simply in terms of how a single material's properties change.
We’ve even included some other flirtatious, printable candy tags – exclusively for other Willy Wonka treats!
Share these teasing, love notes and goodies with your spouse after your romantic evening, or save them as small gifts to present throughout the week!
His classic children's novel, Charlie and the Chocolate Factory, and its film adaptations are the source of both the packaging and the marketing styles of the Wonka brand.
The brand was launched in 1971, coinciding with the release of the novel's first film adaptation.
But Tam Fry, a trustee of the National Obesity Forum, said: "This is totally contrary to what the food manufacturers shuold be doing, which is to lessen the calorie content of their products.