Place chocolate chips in microwave-safe bowl. Heat cream in saucepan until simmering, then pour over chips with hot coffee. Let sit 5 minutes, stir until smooth, and cool 1 hour at room temperature, stirring every 15 minutes.
Preheat oven to 350F and line 18 muffin cups with paper liners.
Whisk together flour, cocoa powder, espresso powder, baking soda, and salt.
In separate bowl, whisk sugar, oil, eggs, cooled coffee, and vanilla until smooth.
Add dry ingredients to wet ingredients and stir just until combined.
Divide batter between muffin cups, filling each 2/3 full.
Bake 15-17 minutes until tops spring back when pressed.
Cool in pans 10 minutes, then transfer to wire rack to cool completely.
Transfer cooled ganache to stand mixer with whisk attachment and beat on medium-high 1-2 minutes until thickened and slightly paler.
Pipe or spread ganache onto cooled cupcakes and top with chocolate espresso beans and jimmies.