Prep the glass: If you like a spiced rim, rub a lemon wedge around the rim of a rocks or highball glass. Dip into the cinnamon-sugar mix and set aside.
Build the base: Add ice to the glass. Pour in the bourbon, apple cider, lemon juice, and maple syrup.
Add bitters: Dash in the Angostura if using.
It adds a subtle spice note and rounds out the sweetness.
Top with bubbles: Gently pour in sparkling water or club soda. Stir softly once or twice to combine without killing the fizz.
Garnish and serve: Slip in an apple slice, add a lemon twist, or tuck in a cinnamon stick. Sip right away while it’s cold and lively.