A cooking and wellbeing activity in one day in Ubud may fit, but the answer depends on the schedule for your date. The class and the additional activity are arranged separately, so ask for the proposed start, end, locations and time between them before adding another appointment.
Plan backwards from a fixed commitment
Start with the latest time you need to finish or the next place you must reach. Ask when the cooking session begins, how long the meal takes and whether the separate activity requires travel. That gives the host real limits to work with.
Avoid building the day around an assumed duration. The public description says timing is by arrangement, so your confirmation matters more than a general estimate.
Confirm the order and travel gaps
Ask which part happens first, whether the locations are close and whether your group has time to pause between them. The sequence is not something to infer from a sample description.
If the plan feels tight, consider leaving the rest of the day open. Pickup, a meal and a separate activity all take time, even when each part is simple.
Include transport in the calculation
Ubud pickup and return are listed as free. Transport outside Ubud is quoted by location and paid by the guest. Share your pickup area and ask whether the activities use one place or require a transfer.
For questions to send, use planning a cooking and wellbeing day in Ubud. Balinese cooking and healing experience Ubud outlines the current format; an Ubud Cooking Class links to the cooking experience itself.