Give the jar of red pepper jelly a good stir with a spoon to loosen it; this helps it flow more easily and spread evenly over the cream cheese. If the jelly is very firm from the refrigerator, let it sit at room temperature for 5 to 10 minutes, or microwave it in 5-second bursts just until it loosens slightly (do not let it get hot or runny).
Spoon the red pepper jelly over the top of the cream cheese block, letting it gently cascade down the sides. Aim to cover the top surface completely and allow some jelly to pool around the base on the glass platter for a glossy, inviting look.
Arrange the crackers around the cream cheese and pepper jelly on the glass platter, or serve them in a bowl alongside. If you like a tidier presentation, leave a small gap between the crackers and the jelly so guests can see the full block of cream cheese topped with the bright red jelly.
Serve immediately with a small cheese knife or spreader so guests can cut or scoop into the cream cheese and drag it through the jelly. If you need to make it a bit ahead, assemble the cream cheese and jelly on the platter, cover loosely with plastic wrap, and refrigerate for up to 2 hours. Add the crackers just before serving so they stay crisp.
