The phrase "a cake in a" is correct and usable in written English.
It can be used in contexts where you are describing a cake that is contained within something, such as a box or a pan.
Example: "She brought a cake in a beautiful box to the party."
Alternatives: "a cake inside a" or "a cake within a".
You cannot make a cake in a rush.
She bids me sit down and offers me a cake in a box.
Fashion does not interest me, only style.' She bids me sit down and offers me a cake in a box.
That said, former mime artist Eloise Moody, currently a hatter, tells me she once mimed making a cake in a kitchen made of treacle for an exam.
The Great British Bake Off is niceness personified, to the extent that the sight of a man putting a cake in a dustbin last year was considered shocking enough to make actual front-page news.
Pro tip: if you cover a cake in a sufficient quantity of holographic glitter (about £2-3 a pot), it creates a sort of shimmering disco halo around your creation, blinding observers to its awfulness.
It isn't clear that there's any particularly great moral claim to give it to someone else, but I think people read this as a situation about splitting a cake in an environment of distributional justice.
But it also includes a gray-suited businessman in a Lufthansa ad, and a Miele campaign that features a woman, potholder in hand, fawning over a cake in an oven.
For example, you can use the microwave more often, eat more salads and instead of baking a cake in an oven, use a pressure cooker to reduce cost of electricity.
Another festive hit is a Christmas cake-in-a-bag from a revered British cookery writer, Delia Smith.
Dessert at Le Cirque was a chocolate "stove --a cake in the stove --aan oven, complete with stove --a filled with fruit syrups.
