So my fiance hates ketchup and eats mustard on everything. This April fools day I am going to play a prank on her. One she won't be expecting.
I do apologize in advance for the small pictures. This is my first instructable and I used my cell phone to take pictures.
Step 1: Step 1
First thing you need to do is remove the cap from the mustard.
Step 2: Step 2
Stick the corner of a sandwich bag down in the mustard jar.
Step 3: Step 3
Fill the bag with ketchup
Step 4: Step 4
Replace cap to mustard.
Step 5: Step 5
Cut excess bag once you have the cap back on.
Step 6: Step 6
Have a camera so you can catch their reaction once they go to apply mustard and ketchup comes out.