You can do just about anything with this recipe and it will still come out great. Reduce the mint to 1t, or use almond, hazelnut, rum, or cherry extract instead. Omit the mint and add a few tablespoons orange zest and some coffee extract. Or omit the mint and add 1/2 t cinnamon, nutmeg, and cloves for a chocolate spice cake.
You can use a 9 x 5" loaf pan instead of the bundt cake. You can also make muffins. And I would bet you could use a 9 x 13" baking pan to make brownies, though I haven't tried that (you'd have to adjust the cooking time down to 15-25 minutes I'd guess).