Should Cake Mixture Be Thick?

The perfect consistency of pound cake batter is thick, kind of like pancake batter. It's okay if it's a little clumpy, you might see granules of butter but they will melt when it's baked. Over mixing butter/pound cake batter can result in a bready cake so make sure you don't go on mixing for too long.

What happens if cake batter is thick?

Thick cake batters results in a lighter fluffier cake and the thin soupy batter would be dense and heavy. I find thick batter will result in dense, heavy cakes. Watery batter results in light and fluffy cakes - that's from my experience.

Is cake Mix supposed to be runny or thick?

Cake batter should have a "dropping" consistency; this looks like the batter dripping smoothly and slowly from a spoon when tilted.