10 Vanilla Beans by Vanilla Products USA. 4″ to 5″ in length.
You can add this right to your homebrew or soak them in alcohol to make an extract and add that to your homebrew.
10/3/21 6:30 PM Central: These are selling for just $8.70. That’s the best historical third party Amazon price I found, notwithstanding Lighting Deals or coupons. Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices and availability can change quickly. Check product page for current info – More About Prices
Vanilla Products USA 10 Extract Grade B Vanilla Beans 4~5 inches (12~14 cm) – note that multiple variations of this product may be available, as such a different version may appear at this link