You could substitute most hard alcohols for the bourbon here, but I think that cognac, scotch, and brandy would provide the best flavour profile. For a stronger flavour, add half a shot of bourbon to the blueberry coulis towards the end of its cook-time.
Spiked French Toast
2 large eggs
1 shot bourbon
1/2 teaspoon ground cinnamon
2 slices of bread
Heat a large frying pan over medium heat. Whisk the eggs, bourbon, and cinnamon together in a flat container or wide bowl. Soak each side of the bread in the mixture for 1-2 minutes, then place the bread on the heated saucepan. Flip the bread once the first side is golden, after roughly 1 minute. Top with powdered sugar or blueberry coulis (see below).
Blueberry Coulis (optional, but why not?)
1 cup water
1 cup blueberries
1 teaspoon sugar
Combine all ingredients in a small saucepan and bring to a boil. Let boil for 7-10 minutes, or until the mixture has thickened considerably. Let sit over medium-low heat, stirring occasionally, until the french toast is ready.