You should aerate the batter before baking.

To introduce air into a substance, often to improve its texture or flavor.
It's important to aerate the wine before serving.
She decided to aerate the soil in her garden.
You can aerate the cream to make it fluffier.
aerate the dough
aerate the wine
aerate the soil
oxygenate
ventilate
inflate
You should aerate the garden soil for better plant growth.

To introduce air into soil or a substance to improve its quality.
It's important to aerate the lawn regularly.
We need to aerate the compost pile to help it break down.
Aerate the potting mix before planting seeds.
aerate soil
aerate lawn
aerate compost
ventilate
oxygenate
freshen