Preheat oven to 325°F. Set aside a 12-cup bundt pan—you’ll grease and flour this later.
In a medium bowl, whisk together flour, cardamom, salt, and baking soda.
With a hand mixer in a large bowl or a stand mixer, beat together butter and sugar until fluffy. Beat in one egg at a time. Stir in vanilla. Setting the mixer to low, gradually alternate stirring in increments of the flour mixture and buttermilk.
Grease the inside of the bundt pan and dust with flour, or spray with nonstick baking spray with flour. Bake for 70-80 minutes, until the cake pulls away from the sides of the pan and a toothpick inserted into the center comes out clean. Mine took 70 minutes.
Cool in pan for 15 minutes. Using oven mitts to hold the hot bundt pan, place a cooling rack over the pan opening and invert. Gently tap the sides of the pan to loosen the cake. Cool completely on a cooling rack, then slice. Garnish with a dusting of powdered sugar and fresh fruit.
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