Get ready to channel your inner Willy Wonka. Cadbury is asking the public to invent a brand new chocolate bar to complement the confectioner's current crop of Dairy Milk products, The Independent reports.

As part of the contest, would-be chocolatiers can select up to three ingredients to create a custom Cadbury chocolate bar. There are more than 90,000 possible flavor combinations, so if you want to invent a bubblegum-spearmint-coffee chocolate bar, you can knock yourself out. Some of the more unconventional ingredients to choose from include popping candy (as in Pop Rocks), tomato, rose, and dijon mustard. There are also more traditional dessert flavors available, like almond, toffee, and cookie dough.

After you choose your flavors, you'll need to name your candy bar. (If past public naming contests are anything to go by, you'll win points just for keeping it clean.) If you want, you can also provide a short explanation of what inspired your recipe.

A panel of judges will create a shortlist of the best fan-created chocolate bars based on taste and creativity. Three finalists will receive a trip to Cadbury’s headquarters in Birmingham, England, where they’ll have the chance to taste their creations in person. All three finalists' chocolate bars will hit store shelves in the UK and Ireland for a limited run sometime in 2019, and the winning bar—chosen through a combination of sales data and public voting—will stay on shelves for at least a year. The lucky chocolatier who created the bar will receive a yearlong supply for free.

To design your own bar, visit Cadbury’s website and submit your entry before July 31.

[h/t The Independent]