Concoct

to concoct a potion

to concoct a new dish

Their only regret was, that Mademoiselle Carrara would taste none of the conserves and the pastry they were so busily concocting.

Pecan shells make good fuel, and they are used by leather tanners to concoct their foul-smelling compounds, and sometimes we mix them with charcoal in hand-soap to make a really good scrubbing agent

The twelve include Jill (she used to be a chicken-and-potatoes girl, but now she's willing to try whatever I concoct), […]

to concoct a cunning plan

On the other hand, the finest argument ever concocted, the concentrated wisdom drawn from men and books, will fail to charm, like the hilarity of a dance, or the splendour of a gala, the young, gay girl, whose spirits are exuberant, and whose heart is untouched by care, and who, a dozen years afterwards, would, in calm cheerfulness, listen lovingly, and examine carefully, the pleaded reasons offered to her judgment.

He had two beautiful daughters who fell in love with men he approved of and he wanted to give them the most lavish double wedding he could concoct.