Grapefruit wedges and jalapeño slices, for garnish
First we are going to make our jalapeño infused tequila.Slice up your jalapeños and add them to your silver tequila in a jar. Cap your jar and allow it to sit for 2-3 hours, or until it reaches your desired level of spice.
Once it is spicy enough for you, strain your jalapeños out so that you are just left with the infused tequila. Store in a jar with a tight fitting lid, such as a mason jar.
Use a lime wedge to moisten the edges of your cocktail glass and then place it rim side down on a plate of sugar or salt (whichever you prefer) I used sugar in this recipe to balance some of the bitterness form the grapefruit. Add ice to your rimmed glass and set aside.
To make your margarita you are going to fill a cocktail shaker with ice. Add your grapefruit juice, jalapeño tequila, lime juice, and agave to the shaker. Shake vigorously.
Pour the contents of your shaker over the sugar rimmed glass with ice in it.
Garnish with a grapefruit wedge and a jalapeño slice.