ET writes that ERS told him that the Church believes in a Heavenly Mother who is co-creator with God the Father (with an "Adam-God" understanding).
Eliza R. Snow, as quoted in Edward Tullidge, The Women of Mormondom (New York: Tullidge and Crandall, 1877), 193-94
The oracle of this last grand truth of woman's divinity and of her eternal Mother as the partner with the Father in the creation of the worlds is none other than the Mormon Church. It was revealed in the glorious theology of Joseph and established by Brigham in the vast patriarchal system whcih he has made firm as the foundations of the earth, by proclaming Adam as our Father and God. The Father is first in name and order, but the Mother is with him--these twain, one from the beginning.