Preheat your oven to 350°F (175°C).
Melt 4 tbsp butter in your cake pan or skillet over low heat. Sprinkle ½ cup sugar evenly and let it melt into a caramel layer.
Place the peach wedges on top of the sugar in a circular pattern.
In a bowl, cream 4 tbsp butter and ¾ cup sugar until fluffy.
Add eggs one at a time, whisking until combined.
Stir in bourbon and vanilla.
In another bowl, whisk all-purpose flour, almond flour, cinnamon, and baking powder.
Gradually add dry ingredients to the wet ingredients, stirring until just combined.
Pour the batter gently over the peaches in the pan, smoothing the top with a spatula.
Tip: If any peaches stick to the pan, lift them out with a spoon and place them back on the cake.