In a medium mixing bowl, cream together butter and sugar until it looks fluffy like a cloud you’d nap on.
Crack in the eggs one at a time, mixing after each. It’s not a race—just smooth and steady.
Add vanilla extract and stir like you're whispering a secret into the batter.
In another bowl, whisk flour, baking powder, and salt together. Because they need to meet before the big party.
Gradually add the dry ingredients into the wet, alternating with milk. Stir gently until just combined.
Grease a microwave-safe cake dish or silicone mold. Pour the batter in and smooth the top like you're icing a skater's rink.
Microwave on high for about 7–9 minutes, checking with a toothpick starting at 7. It should come out clean or with a crumb or two—no goo.
Let it rest for 5 minutes (yes, cakes need naps too) before slicing.