Preheat your oven to 350°F and grease and flour a 10 to 12-cup Bundt pan.
In a large bowl, combine the yellow cake mix, instant lemon pudding mix, vegetable oil, orange juice, and eggs using an electric mixer. Mix until smooth, about 2 minutes, before pouring the batter into your prepared Bundt pan.
Place the pan in the preheated oven and bake for 35 to 40 minutes. Check doneness by inserting a toothpick into the center; it should come out clean when done.
While your cake cools in the pan, prepare the glaze by combining powdered sugar, orange juice, and butter in a small saucepan over medium-low heat. Stir frequently until the butter melts completely.
Once your cake has cooled slightly, use a skewer or toothpick to poke holes all over its surface. Pour the warm glaze over the cake while it's still in the pan.
Allow the cake to cool in the pan for an additional 15 to 20 minutes before inverting it onto a serving platter. For best results, let it rest for about 8 hours before serving.