Amer Boudreau is a replica of the historic (higher proof) Amer Picon, created by bartender and mixologist Jamie Boudreau. His recipe requires that you first make a tincture of orange peel, then mix that with Amaro Ramazzotti and Stirrings blood orange bitters.
Fill any sealable container halfway with dried orange peel. Fill with 100-proof vodka. Wait 1-2 months. Strain. Reduce infusion time to 3-6 weeks by shaking thrice daily. Reduce to 3 weeks by using high-proof grain neutral spirits (Everclear) and add water to bring to 100 proof.
25 oz Ramazzotti (1 bottle)
20 oz Orange tinture (2 1/2 cups)
3 oz Stirrings blood orange bitters (1/4 bottle)
8.5 oz Evian mineral water (1/4 liter)
Rest 1 week. Filter. Refrigerate.
Jamie quotes the recipe in 3x the above, making 6-7 bottles at a time. The historic Amer Picon was 39% ABV. As specified, Amer Boudreau is 31% ABV. If you omit the mineral water, the ABV is 36%. but the flavors may be a bit strong. If you substitute 100 proof vodka for the mineral water, the ABV is 38.5%.
Reference: Amer Picon, Spirits and Cocktails blog, Jamie Boudreau