One stick (1/2 cup) is 8 tablespoons. So 1 1/2 cups equals 24 tablespoons. That’s a lot of scooping, but hey—no judgment. Just make sure you’re using a proper measuring spoon, not the one you use to eat soup.
Butter Measurements and Common Butter Conversions - Let's Eat Cake
And if you’re measuring from a tub of whipped butter, pause. Whipped butter has air whipped into it, so 1 cup of whipped butter is actually less fat than 1 cup of stick butter. For baking, always use the dense, stick kind—otherwise your cake might collapse in shame.