1️⃣ Preheat oven & prep pan.
Preheat to 350°F. Grease and flour a 10–12 cup bundt pan well.
2️⃣ Mix dry ingredients.
In a medium bowl, whisk flour, baking powder, baking soda, and salt.
3️⃣ Cream butter & sugar.
In a large bowl, beat butter and sugar until light and fluffy. Beat in eggs one at a time. Mix in orange zest, juice, and vanilla.
4️⃣ Combine wet & dry.
On low speed, mix in dry ingredients alternately with buttermilk, beginning and ending with flour. Fold in cranberries.
5️⃣ Bake.
Pour batter into prepared pan. Bake 50–60 minutes, until a tester comes out clean. Cool 15 minutes, then invert onto a rack to cool completely.
6️⃣ Glaze.
Whisk powdered sugar and orange juice to make a pourable glaze. Drizzle over cooled cake.