Preheat your oven to 325°F (163°C). Prepare a bundt or tube pan by greasing it and dusting it with flour. This step ensures that the cake comes out of the pan without sticking.

In a large mixing bowl, beat together the softened butter and shortening on medium speed for 1 to 2 minutes, until the mixture is smooth. Add the granulated sugar and beat the mixture until it turns light and fluffy. Next, add the eggs, one at a time, along with the vanilla extract and lemon extract. Mix everything together until well combined.

Gradually add in the all-purpose flour, about 1 cup at a time. After all the flour is mixed in, slowly pour in the Mountain Dew soda. Stir the mixture until it’s just combined. Be careful not to overmix as this can lead to a denser cake.

Pour the cake batter into your prepared bundt or tube pan. Spread it evenly and gently tap the bottom of the pan on the countertop to remove any air bubbles. Place the cake in the preheated oven and bake for 1 hour and 15 minutes, or until a toothpick inserted into the center comes out clean or with only a few crumbs.

Once the cake is done, remove it from the oven and allow it to cool in the pan for about 10 to 15 minutes. This cooling period allows the cake to firm up and makes it easier to remove from the pan.

While the cake is cooling, prepare the glaze. In a medium-sized mixing bowl, whisk together the melted butter, powdered sugar, and remaining Mountain Dew soda. Stir until the glaze is smooth and well combined.

Once the cake has cooled slightly, drizzle the glaze evenly over the top of the cake. Make sure the glaze soaks into the top, giving the cake a beautiful, shiny finish.