Preheat the oven to 180°C/ 350° F.
Now, gather all your ingredients and prepare them in the right amounts. That makes it so much easier and more fun and you're less likely to forget anything.
Bring plant milk with earl grey tea to a boil and steep for about 5 minutes.
In the meantime, combine flour, sugar, baking soda, salt and vanilla powder in a big bowl. If using liquid vanilla, you can add it to the liquid ingredients in the next step.
Pour the Earl Grey mixture through a sieve and mix with plant oil and apple cider vinegar. Then add liquid mixture to the bowl with the dry mixture and stir until just combined. You might have to add a little more plant milk if too much evaporated when making the tea.
Pour into a 20-25 cm/ 9" loaf pan and bake for 40 minutes.
Combine one cup of powdered sugar with 1 tablespoon of plant milk and 3 drops bergamot oil into a thick frosting and apply to the cooled off cake. Add a little more plant milk if needed. Let dry and serve, or keep in the fridge in an airtight container.